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With Raw focusing on the big WrestleMania feuds such as The Undertaker vs. CM Punk, Triple H vs. Brock Lesnar and The Rock vs. John Cena, SmackDown will be responsible for bolstering the undercard rivalries, which is something that must be done effectively this week with WrestleMania XXIX less than three weeks away.

The main angle on the blue brand continues to be the World Heavyweight Championship feud between Alberto Del Rio and Jack Swagger. Their storyline has actually been in motion longer than any other one on the the WrestleMania card currently as it started back at Elimination Chamber. The buildup has been solid thus far, but it needs to continue moving forward.

There are also several other potential angles that need to get moving in order to generate interest for WrestleMania. One of them is Big Show's potential involvement in Randy Orton and Sheamus' feud against The Shield. In addition to that, Ryback vs. Mark Henry was announced as a WrestleMania match on Raw, so their rivalry figures to kick into another gear on SmackDown.

Here are the top five things you should keep an eye on while watching this week's edition of SmackDown with WrestleMania XXIX looming large.

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The involvement of celebrities at WrestleMania is something that fans seem to have mixed feelings about currently, but if not for their presence during the early years of WrestleMania, there is no telling whether wrestling's biggest spectacle would have reached the heights that it has.

There is no doubt that some celebrities have fallen flat on the big stage, but several have taken their roles very seriously and added to the event. WrestleMania will always be about the regular performers first and foremost; however, fringe fans are interested in mainstream stars, so the WWE has to deliver them.

Perhaps celebrity involvement isn't as prevalent now as it was at WrestleMania I, but we usually see a handful of celebrities at WrestleMania on a yearly basis and that figures to continue moving forward. Just as has been the case in the past, some of them will be awful, some of them will be average and some of them will be great, but hopefully the majority fall into the latter category.

Here are the top five celebrity contributors over the long and storied history of WrestleMania.

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Photo courtesy of WWE.com

The Undertaker is 20-0 at WrestleMania, and by the time WrestleMania XXIX has come and gone, he will likely be 21-0. Despite that, the past couple of weeks have proven that CM Punk is Taker's greatest threat from a storyline perspective.

There is no doubt that The Undertaker is among the most menacing and intimidating superstars of all time. Taker has used his size and his mysterious persona to strike fear in his opponents many times over the years, and that is a huge part of his character. Although Taker's gimmick is still somewhat supernatural, he has become mortal over the past couple of years as he ages.

Triple H nearly defeated The Undertaker at WrestleMania two years ago, as it took a desperation Hell's Gate from The Deadman to turn away The Game. Triple H very nearly beat Taker again last year as well in a Hell in a Cell match with Shawn Michaels as the special guest referee. It was clear that The Undertaker wasn't the same as he used to be, but he still put on an incredible match and came away victorious.

Many fans questioned whether or not The Undertaker would compete at WrestleMania XXIX due to mounting injuries and advancing age, but he showed up at a house show in Waco, Texas, several weeks ago and officially returned on the old school edition of Raw. Punk beat Big Show, Sheamus and Randy Orton in a Fatal 4-Way match on that same episode to earn the right to face Taker at WrestleMania.

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Due to WrestleMania's immense popularity with WWE fans, it is quite surprising that many of the earlier WrestleManias were never released on single DVDs. Thanks to the WWE's partnership with Walmart, however, that is no longer the case as every 'Mania from I through XV is currently available.

Those WrestleManias were formerly only on the market as part of box sets, but now WWE fans can pick and choose which ones they want to watch. As a huge fan of late-1980s and early-1990s wrestling, these releases are certainly right in my wheelhouse and it's fair to say that the same is true for many of the company's current fans.

As much as I enjoy the time period from WrestleMania I through WrestleMania XV, not every event is required viewing. There is no question that something good can be taken from every WrestleMania, but some of them are lacking from an overall entertainment perspective, so you shouldn't rush out to add them to your collection.

Here are the top five WrestleManias from I through XV that are must-buys for any wrestling fan. Perhaps some fans may not be familiar with them due to their limited availability over the years, but there is no doubt that they deserve a spot on every wrestling fan's shelf.

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Photo courtesy of WWE.com

As puzzling as it is to most wrestling fans, it appears as though Fandango will challenge Chris Jericho at WrestleMania XXIX. It is far from certain, but every indication seems to be pointing in that direction. If that is the case, then Fandango has to go over in order to justify his drawn-out debut.

The WWE has hyped Fandango for months with vignettes and promises of an in-ring debut, but we now sit a few weeks away from WrestleMania and he still hasn't competed on WWE programming. That is obviously by design, but the WWE has put a lot of pressure on itself because it needs to handle Fandango correctly or else the fans could turn on him quickly.

His trolling of the fans has been entertaining in one respect thus far, as he continually promises that he will debut before ultimately deciding against it. His gimmick has undoubtedly garnered him some heel heat and he could potentially become a key player in the midcard if the WWE books him well moving forward.

Fandango interrupted Jericho during a promo on the most recent episode of Raw. It resulted in Jericho making fun of Fandango's name before Fandango decided to storm off. It was a very brief exchange and it really shouldn't be the reason behind a feud and WrestleMania match, but the WWE seems intent on making Fandango vs. Jericho happen at WrestleMania XXIX.

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Photo courtesy of WWE.com

There is absolutely no question that Paul Bearer was one of the greatest managers in the history of professional wrestling, and he deserves to one day be enshrined in the WWE Hall of Fame. Rather than inducting him this year on the heels of his tragic death, however, the WWE should wait for a more fitting time.

Wrestling fans everywhere mourned Bearer's untimely death a couple weeks ago, and that continued on last week's edition of Raw. The WWE played video tributes to Bearer throughout the night, and it was great to see such a well-respected man receive his due credit. Naturally, with WrestleMania XXIX approaching fast, Bearer's potential status as a Hall of Famer has been discussed among fans quite extensively.

I certainly wouldn't complain if the WWE were to make the decision to put him in the Hall this year, and I don't think that anyone would, but at this point it seems like waiting is the more prudent maneuver. With the addition of Booker T to the 2013 class, there are now six people in line to be inducted at Madison Square Garden the night before 'Mania, and that is more than enough. Adding another would clutter things and take time away from those who have already been announced.

The one thing that the WWE doesn't want to do is overshadow Bearer's induction, but that would be inevitable based on the other inductees. Bruno Sammartino is the headliner, and he is joined by an extremely strong supporting cast in the form of Mick Foley, Donald Trump, Trish Stratus, Bob Backlund and Booker. The 2013 class is made up of the two longest-reigning WWE Champions of all time, a hardcore legend, a mainstream star, arguably the greatest diva of all time and a five-time WCW Champion.

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Photo courtesy of WWE.com

WrestleMania is unquestionably the WWE's biggest show of the year, so it should receive the most thorough and logical build possible. While the writers have done a nice job with the main event scene, the undercard has been neglected, and it will ultimately prevent WrestleMania XXIX from being elite.

Although I'm sure that every fan isn't enamored with WrestleMania's triple main event, there is no denying the fact that the main event matches make sense and have plenty of star power. The Rock vs. John Cena, The Undertaker vs. CM Punk and Triple H vs. Brock Lesnar are headliners on any show, so the WWE doesn't have a lot to worry about in that regard.

The true issue is the undercard as there are far too many matches in the works that have been clumsily put together at the last minute. In a perfect world, the build for most WrestleMania matches should begin at the Royal Rumble or at Elimination Chamber at worst. A handful of the supporting feuds on the 'Mania card weren't conceptualized until recently and that clearly isn't a recipe for success.

If all of the main event matches live up to their advanced billing and then some, maybe WrestleMania XXIX will be viewed as a great one. The odds of all three top matches being carried out to perfection aren't very good, though. At least one of them is bound to fall flat to some degree, but the WWE doesn't have the necessary undercard depth to make up for something like that.

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Photo courtesy of WWE.com

When it first became apparent that Triple H and Brock Lesnar would face off at WrestleMania XXIX, there was no doubt that the WWE needed to put forth some intriguing stipulations to keep the fans interested. That is now certainly the case, and it should lead to a highly entertaining encounter.

Triple H and Lesnar have plenty of history, as they wrestled at SummerSlam in a match won by Lesnar via his patented Kimura Lock. As far as the storyline goes, Triple H considered retirement after the loss and was seen quite infrequently thereafter. He made his return to television a few weeks ago, however, when he saved Vince McMahon from an attack at the hands of Lesnar.

Triple H then issued a WrestleMania challenge the following week on Raw. Lesnar and Paul Heyman accepted last week under the condition that they be allowed to set the stipulations without Triple H knowing them ahead of time. Triple H proved his desire to face Lesnar as he signed the contract blindly on the most recent edition of Raw.

Despite the fact that Triple H battered Heyman due to inflammatory comments that he made about Stephanie McMahon, Heyman was giddy after Triple H signed on the dotted line. To close Raw he revealed that the Triple H vs. Lesnar match at WrestleMania would be No Holds Barred. In addition to that, Triple H's career is on the line, and he will be forced to retire if he loses.

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At this point, it seems as though most WWE fans are in agreement that Randy Orton would benefit greatly from a heel turn. If the creative team decides to go through with a change at WrestleMania XXIX, however, it should not lead to The Viper being revealed as the leader of The Shield.

The Shield has made life miserable for Orton over the past few months, so it is no surprise that he is in line to face Dean Ambrose, Seth Rollins and Roman Reigns at 'Mania. In all likelihood, Orton will team up with Sheamus and Big Show, as they have been targets of the young trio as well.

Orton and Sheamus chose Ryback as their partner on SmackDown, but there is something more to Ryback's feud with Mark Henry. With that in mind, Ryback will almost certainly bow out, which will lead to Big Show taking his spot. Orton and Sheamus neglected to pick Big Show because of their past issues with him, but it is inevitable that they will join forces with Big Show in an effort to vanquish The Shield by hook or by crook.

Since The Shield remains undefeated as a group and is coming off a huge win over Sheamus, Ryback and John Cena at Elimination Chamber, all signs point to them winning at WrestleMania as well. Logically, Big Show could cost his team the match since he is a heel and will have his own agenda. In order to truly make an impact, though, Orton should cost his team the match or snap after it ends.

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Photo courtesy of WWE.com
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The WWE has held WrestleMania in cool-climate locales many times over the years, and it has been staged outdoors quite often as of late as well. WrestleMania XXIX at MetLife Stadium in East Rutherford, N.J. marks the first time the WWE has combined both of those factors, but I doubt it will be the last.

Plenty of fans were surprised when the WWE announced last year that WrestleMania XXIX would take place at MetLife Stadium due to the erratic weather conditions. The show is set to happen on April 7, and while the New York City area's temperature is usually on the upswing by that point, almost anything can happen, including rain or snow.

I'm sure that Vince McMahon and the rest of the WWE brass would prefer a 60-degree day with no precipitation, but I doubt that a little moisture will deter the WWE. When push comes to shove, the company is about making as much money as it possibly can and getting as much exposure as it possibly can. Both of those things will come to fruition this year, and that alone is good enough for the WWE.

MetLife Stadium is still a new facility and has yet to host an event as big as WrestleMania. The Super Bowl will be staged there next year, but the WWE has the privilege of truly breaking the stadium in. Also, there is no place in the United States that supports more currency exchange than the New York/New Jersey area. The WWE will have tons of festivities during the week leading up to WrestleMania, and the company stands to make a killing.