Jazz in 3D would be great. There is nothing wrong with 2D, of course. I love 2D as much as 3D. I don't see why they have to be contrasting. I don't think 3D is a step up from 2D, but unfortunatly people seem to think of it that way. Jazz2 is a kind of 3D. You've got the basic X and Y, but there are multiple layers. The only problem is that you cannot move in those layers, they are just there to look good =P

Anyway, things are just going 3D. It's the way it is, and since people are biased against 2D, the only way to gain a larger audience is to change market strategies so that it appeals to 3D gamers.

You can't say Jazz is just a childrens game. It stars a bunny, but how many other 3D shooters starred animals or aliens? Plenty, and not all of them are kid games. Jazz is edgier, methinks. Jazz2 kind of lost that edge because it was much too cartoony in spots. I don't think blood and gore is the way to go with Jazz, but you never know. Though if there is blood, there should be an option to disable it since it isn't really necessary. At all.

imho Jazz3 should be a mix of action, strategy, and rpg. It should be a lot of action with a blend of puzzles/strategy added in to make it less monotonous and it should follow an interesting storyline closely and the three should be actively involved.