Platform:
* W32/NT (Longhorn is still NT if you ask me and so is 2k, xp and 2k3)
* Linux, Mac (new mac is based upon Linux so would be no problem)
* maybe re-compiled versions for consoles

The game:

Massive Multiplayer, First Person/Thirdperson shooter.
playing with tons of new friends in the large jazz1/2 worlds.
in those worlds there will be large arenas where players can fight each other.

Game types (playable in the Arenas in the worlds):
* Battle, CTF, Race, etc
* King of the hill
* Last creature standing
* someting like Trick atack like in the thony hawks pro skater series

Storymode?
there will be large worlds with mountants and stuff where each one can make his own story by chatting with others, walking around in the world of the jackrabbits, urning credits etc (the usual stuff)

celshading?
yes but only if ots good shading, couse i have seen ugly shading since i am doing it myself, good celshading is when it looks like a cut scene from jj2 or just the cartoons you see on TV.

(some of you will notice that some of these things are planned in my own 3d project, but if i could make out the rulez jazz3 would look like this, kinda)