I know Undertaker is a good wrestler and all but he is getting a bit too old, so I've come up with a perfect storyline to end the Undertaker's career so here it goes.
Summerslam:
It is announced that a trade will be made that night.
Undertaker is shown going to the office of Eric Bischoff. Undertaker comes out with a smile on his face. Later, Undertaker is shown coming out of Stephanie McMahon's office with a smile on his face.
Eric Bischoff and Stephanie McMahon come out. Eric calls out the Undertaker.
Eric: 'Taker you know we've talked about about it. Now just sign here in the contract and you're a part of Raw.
Taker grabs the contract.
Taker: No!
Taker chokeslams Bischoff
Stephanie: Good thing. Undertaker, you belong on SmackDown!
Taker: No, I don't!
Undertaker is about to give the last ride to Stephanie McMahon until Austin comes out.
Austin: Put her down right now.
Taker puts her down.
Taker: Or else what?
Austin: Or else you won't be allowed to go to Raw!
Taker smiles and signs Austin's contract.
The following day on Raw...
The main event is Triple H Vs. Undertaker for the heavyweight title or non-title depending if Triple H beats Goldberg at Summerslam or not.
When Undertaker is about to win, Evolution comes in and destroys the Undertaker and put him out for an injury for 7 months.
WRESTLEMANIA XX
-There's been a buildup of Undertaker's return and Triple H has challenged him so he can stop the undefeated streak at WrestleMania once and for all.
-Triple H waits in the ring.
-Undertaker's music hits but nobody's coming out. The lights go off and the Undertaker's old music plays. Undertaker walks out with a purple haze following him to the ring.
-Triple H and Undertaker stare eachother down.
Triple H: Undertaker, how's about if I beat you then I end your career.
Undertaker: This is my last match, Hunter! I've beaten everybody around here. I just want to settle the score and stop wrestling. 'Cause Triple H, tonight you will be the last one to 'Rest In Peace!'
It's a long 1/2 an hour match until Undertaker tombstones Triple H 5 times and wins the match.
Undertaker says his goodbye's and leaves.