User blog comment:Mckrongs/Monster Hunter 4 for the Nintendo 3DS/@comment-76.69.3.243-20120907163821

Velocidrome and Great Jaggi are both in this game. Great Jaggi is a replacement for Velocidrome. Think about it. Not only is Capcom not trying for all-new material in this game, but they aren't shy about using similar content either.

It's quite likely that Monster Hunter 4 will have much more content than Tri.

P.S.: I don't know about climbing, but you can only jump off ledges. That means jumping attacks will only be useful at the start of battle or when monsters escape to another area.