The Five Fingers Represents How Many Moves He Has in His Arsenal
I thought I'd go with the predictable route first with my first pick, our resident superhero, John Cena. Why you ask, well its quite obvious. With him being WWE's face and poster child, it's only normal that they would want their top seller to be in the main event.
Why It's Good
Anything with John Cena's face on it sells, whether it be tickets, shirts, crappy DVD, you name it, it sells. And with The Miz being the WWE Champion, I'm sure the WWE isn't confident to the point that they could put anybody with him as the Main-Event and be sure it will sell.
The Miz vs. John Morrison would not sell as much money as John Cena vs. The Miz would. He is the equal to superman and another Royal Rumble win would just add to his already Hall of Fame career.
He has a tremendous fan base (as you can probably tell, I'm not because I haven't been 10 in a long time) that would go bananas (as he would say, me, I would have went with ape shit) if he won the biggest Royal Rumble in history.
If he won, I'm either looking at two matches walking into WrestleMania, John Cena vs. The Miz (c) w/ Alex Riley for the WWE Championship, or John Cena vs. CM Punk (c) w/ The Nexus for the WWE Championship (Punk wins title at Elimination Chamber). Those two would be ticket selling matches that I would love to see.
Why It's Bad
He's John Cena, that's why it's bad. He can get a title shot whenever he pleases with just the snap of his fingers. The Rumble is used for two things.
1. Skip the three months of promos and main-event competition it would take for someone to face a champion that would make sense.
2. Help establish someone as a Main-Eventer
John Cena is already a main-eventer and it wouldn't make much sense for him to face The Miz or anybody else who might be champion come WrestleMania other then CM Punk. He has been feuding with the Nexus since August and has been feuding with Punk for almost a month as well.
CM Punk vs. John Cena is a match people want to see at WrestleMania, and it doesn't need a world title in the middle of it, either.