It would be a great rematch. The first could have gone either way. Hendo got rampage down, but rampage also got hendo down and reversed him. It may have come down to the standup. I remember both landing huge bombs but rampage seemed to be the more accurate puncher and could have won based on that. It could go either way this time but im betting it would still be another close decision. Both have some of the best p4p power in mma but they also have some of the best chins in mma as well.
Rampage still has his boxing skill, but I do question if he would be as sharp now. He was training under Juanito back then and now his hands dont look as crisp or accurate. Still id bet that it would be another close decision.
But if Rampage cant get past Jones then Hendo will be looking at a much tougher fight to unify the belts. He could take what jones does standing, but would he be able to stop a Jones takedown? He may want to try and get Jon down before he gets him down.