definitely punk. Undertaker has made a HUGE impact on wwe that will last forever, 20 wm victories. twenty years. he's had some of the biggest matches in history. if punk were to just end his streak at the grandest stage of them all, he would break ground in history. But for me that's a match that's obvious that punk won't win, so someone who has a chance of winning that would benefit most would be Cena. Rock is hall of famer, and an 8 time wwe champion, and there has been a lot of hype for this match, even though i think it's gonna suck all kinds of ass.