Goldberg isn't likely to be around WWE for much longer than WrestleMania, so WMXX will likely be his last WWE match. And, the cynic in me says that any World title match for WrestleMania pretty much has to involve Triple H in some way (probably with him going over yet again).
Also, I truly think that Undertaker will never lose at any WrestleMania to anyone. If he didn't lose to Triple H or Flair, he sure won't be booked to have the streak broken by Kane.
"When this bogus term alternative rock was being thrown at every '70s retro rehash folk group, we were challenging people to new sonic ideas. If some little snotty anarchist with an Apple Mac and an attitude thinks he invented dance music and the big rock group is coming into his territory, [that's] ridiculous." - Bono, 1997
When Scott Steiner won the WCW title, that was judged to be the moment when the company threw in the towel. Now, Scott pre-1995 did many great things. He collapsed Sid's lung in '89, possibly derailing his career.