Why MVP isn't been pushed up over someone like Big Show is beyond me. MVP has the potential to be a draw in the future, and Big Show doesn't, yet WWE still hasn't worked that out.
HHH vs Edge seems to be the killer feud to me that hasn't happened yet. It could be a WrestleMania main event, as the build up between these two could be awesome. The closest they have come to this is DX vs Rated RKO, or the Triple Threat at Backlash 2006, so I want to see these two go one on one.