Well, it's been confirmed & it's coming out for PS2 & Nintendo Wii. It will have over 130 characters. Lord Slug (both forms), Android 13 (both forms), Garlic Jr. (both forms), Hildegarn & a few others that weren't in the previous games have been confirmed. The game will also have in game transformations & will have over 11 different totally destructible environments that were in the previous DBZ games. If you want more information go to this website: www.gamefaqs.com
I think that this one is going to be great. They're including basically all of the DB/Z/GT characters. I just hope that they include more cut scenes before & after the fights & that they improve the fighting system. They need to have every move ever performed by a DB/Z/GT character in the game.