The Undertaker is one of the most respected wrestlers, both in and out of the ring, in the entire history of pro wrestling.
He has introduced some of the most popular gimmick matches to the WWE (ie. Hell in a Cell, Buried Alive, Casket Match), but will always be remembered for the most prestigious streak in sports entertainment.
One of the aspects of the Undertaker's persona that is most appealing to fans his ability to make memorable returns after some lengthy absences.
He has been buried and burned alive on several occasions and also been fired/banished a few times, only to make triumphant returns.
Wrestling fans know that the Undertaker will always be lurking in the shadows, no matter what anyone does to him.
However, the one problem with these comebacks is that when the Undertaker finally decides to hang up his boots, the WWE writers will have trouble convincing Undertaker fans that he is truly gone.
Having him buried alive, banished, or burned in a casket will not make WWE fans really believe the Undertaker has finally left the WWE.
Having him "killed" off the show would not also work because he would have to eventually return for his inevitable Hall of Fame induction.
Therefore, I have come up with a way to have the Undertaker finish his career in the WWE without any chance of a full-time comeback.
Assuming the Undertaker is still undefeated at Wrestlemania, either Wrestlemania 27 or 28 should be the last for the Phenom.
Ted DiBiase Jr. should now be an established star in the WWE and be managed by his father, Ted DiBiase. I would even go as far as having him be the WWE Champion.
The Undertaker will win a shot at the title for Wrestlemania and begin a build up for a match against Ted DiBiase Jr.
Ted Jr. will begin weeks of promos saying that he is the hottest superstar in the business and he will finally end the streak of the Undertaker.
Ted will then make a challenge to the Undertaker, saying that if he wins their match, the Undertaker will have no choice but to finally retire from the WWE forever.
The Undertaker will agree to this stipulation but will end up losing his Wrestlemania match and ultimately be forced retire from the wrestling business.
Including Ted Sr. in this feud will be very important, as he was the one who brought the Undertaker to the WWE in the first place. This storyline makes complete sense and really has no holes in it.
By doing this retirement storyline, it leaves open the possibility of having a Ric Flair type ceremony the next night on Raw.
No matter what happens, it will be a very sad day when the Undertaker does leave the WWE. But if done the right way, it will be a very enjoyable retirement storyline for the Phenom.