Man, I have to say this also, The Streak is so overrated! I mean look at who he has beaten, HHH three times who has a horrible WM record, HBK and Kane and the both can be said for them, Big Show and Albert, two wrestlers past their prime and out the door in Snuka and Jake the Snake, Giant Gonzalas (SP), Mark Henry when he wasn't in beast mode, Kevin Nash who was stale, Sid who sucked and wasn't drawing as a champion, Ric Flair who was pretty much a mid card/main event jobber at that point, King Kong Bundy who was almost always a jobber and was past his prime here, and the Big Boss Man who wasn't that great either. Don't get me wrong, some of these matches were great but seriously the Undertaker could easily beat these guys at any other PPV or Televised show for that matter.
Edge, Orton, and Batista could be considered something since the three of them were on top of their game at the time of their defeats. Also, the match with Orton, probably produced the most realistic threat to the streak since he was on fire at the time and billed as "The Legend Killer".
I don't think it would be so bad to let Punk end the Taker's streak of mainly beating Jobbers at Mania... But that is just my opinion.