The original Budokai was for one-on-one 3D fighting game featuring a large cast of characters with extreamly kool graphics.One of the most kool aspects of the first Budokai was the fact that it featured a storyline that closely followed that of the DBZ cartoon(series), from the beginning of the Saiyan saga through the end of the Cell saga. Budokai 2 will not have a story mode like the first one, but instead it will feature a mode currently being called dragon world. In this mode, you'll lead a team of four heroes against a team of four villains in a race to collect all seven dragon balls.This mode will operate much like a turn-based strategy game, where you're given an overview map of the world and you move your characters from location to location looking for the dragon balls. If one of your heroes happens to be in the same location as one of the villains, you'll have to fight with him or her for a single round of fighting. The winner can then move on, continuing on with his or her search for the dragon balls, while the loser is has to stay at that location for a turn. The only thing bad about this is that there will be no good story mode like the first Budokai but it still makes a kool game.
The cast of Budokai 2 will include the full cast of the original Budokai, plus many characters from the after the Ceil Saga of the cartoon series, including Videl, Dobura, and three forms of Buu--Maijin Buu, Super Buu, and Kid Buu. There also promises to be a ton of different fusion characters, including more "what if" fusions that never happened in the show, much like the fusion between Krillin and Cell that was seen at the end of the original Budokai. Which was kind of funny The folks at Atari have said that you'll be able to import your saved game from the original Budokai into Budokai 2. They also stressed the fact that once you've imported your save game, you won't be able to use it anymore in Budokai, so be sure to back up your saved game first.
From what I have read Budokai 2 will have a much more dynamic flying than the first one. So far from what we have seen the game seems pretty good. Hopefully when the game is finished it will have better improvements.