The thing I love about this match is the fact that no one can actually guess for sure what the outcome will be. Especially since both Undertaker and HBK are planning on taking time off after Mania. Also with Taker in pain lately, it seems prime time for the streak to end. Then again, Michaels has been talking about retirement for years, Vince just makes it too hard to walk away.
If Michael's should lose, I don't see it being a permenant thing, just look at the Savage-Warrior match, eventually the Macho Man came back, after spending time as an announcer.
As far as Taker's streak is concerned, I don't think it is his legacy at all. I mean come on look at some of the people he beat, Snuka, Bundy, Boss Man, etc. Sure there is also HBK, Flair, HHH, Edge and Orton, but if the list included all A+ foes then it would mean more. 17-1 is a great record. I admit that I was hoping that it would be Dibiasi Jr who ended it, Shawn makes sense to me. They both have been with the company the longest and over their careers have had numerous terrific battles. What better way to put the cherry on top. To me Taker's legacy is the fact that as a heel, the writers came up with some kick ass storylines for him. His legacy is that he was always true to wrestling, not afraid to do whatever it took to make the business stronger. His legacy is that he was a true professional every step of the way. No stupid streak will ever change that.
With that being said, what I would love to see happen since this match probably will be the ME, I would love to see Bret Hart come out and "screw" HBK. Think about it for a second. Earlier in the night he will finally get his revenge against Vinny Mac when he puts him in the sharpshooter, then he gets even with HBK, "ending" his career.
Or the way out there scenerio but would be cool to see: Hart comes out and helps HBK, screwing the Undertaker over. Hart will then become GM of Raw and finally join the Kliq.