#4 Working DX
If the original New World Order were to work a match at WrestleMania, one angle would be to involve newer talents either as their opponents or as an additional, honorary member in the group to give that younger talent the rub. Another approach, though, would be to pit legends against legends.
WWE teased an nWo vs. DX war at WrestleMania 31, when Hogan, Hall, and Nash backed up Sting against Triple H, who had X-Pac and The New Age Outlaws come to his defense. A match between these two sides would be a bit of a tough sell given the collective age of everyone involved. The two teams do involve a lot of real life friends with tremendous mutual respect between them, though. Moreover, Triple H has proven himself still capable of going in the ring, rumors are intensifying that Shawn Michaels will work a series of matches, and Sean Waltman has still kept up a fairly regular schedule on the indie circuit.
In short, having this match—if kept short and heavy on the sports entertainment shenanigans—really could work. WWE is probably running out of time on it, as Hogan in particular is physically past the point he really ought to be working matches. Returning to the New York metro region for the thirty-fifth WrestleMania would be a fitting enough occasion for him to hit the ring for one last match.