I personally see it being The Game and the Undertaker, again at Mania 28, unless they have a match before that. However I had an Idea for the Undertakers 20-0 match and it goes like this. Have Triple H, Kane and HBK all have a third chance at beating the Undertaker in a fatal 4 way elimination match like the one that main evented Mania 16. This way we get to see all three guys get their third chance and Undertaker gets more of a chance to take breaks in the match to have a strong finish. I see it going down like this. Undertaker pins Kane first, then HBK pins Triple H., and it is down to two. I see HBK doing sweet chin music and just about to win when the game comes back and nails HBK with the sledgehammer, turning heel. Then I see Undertaker pick up Michaels and tombstone him off the second rope, leading to the final pinfall. But soon as the match ends the Undertaker crumbles to the mat and remains motionless. Finally, Paul Bearer returns with the urn, and leads the druids down to the ring. They carry the deadmans body up the ramp and place it in a casket at the top, centre of the ramp. Paul Bearer places the urn on the top of the casket, and he and the druids all leave the stage. Then, after a pause, their is some thunder and lightning, and the lights go out. The undertaker bell then rings 20 times symbolizing his 20 wins at Wrestlemania, as the titan tron or what ever it's called shows each opponent the Undertaker defeated on his quest to 20-0. They could then have the casket and urn sink down into the stage as flames shoot up, and smoke rises up. they could then have on the big screen, Undertaker 1990-2012, R.I.P. I think this would be a fitting way for the the Phenom to end his career.