The article at XBox.com says Development has
just begun on XBox.
Also at XBox.com:
Conker, Banjo, and Kameo look the same:
But J. Dark has a little bit more of a cartoonish effect:
Frankly I like the old J.D.
You can find a video with the characters in motion, about the announcement here:
http://www.xbox.com/news/0209/rarepressrelease.htm