I, for one, am looking forward to the game. And I'm not alone. JazzGBA has already gotten some rave previews in the media, all hailing the return of Jazz and especially the multiplayer options.
Needless to say I also don't quite agree with Jazz' sudden makeover. If there ever is to be another sequel you can bet on it I'll be all over it trying to set straight the storyline. Eva should definately come back, as well as Lori. Actually Jazz and Eva's divorce make for some quite hilarious moments...

Zoe: "Who's that?" *points at Eva*
Jazz: "Ah, she's my ex."
Zoe: "YOUR WHAT?!?"