Meristation.com had a pretty in-depth preview a few days ago. Here's the summary:
- Modes: Story, Versus (against CPU, Player, Online), Trial Mode, Practice Mode, Options.
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The game uses re-mastered versions of the most popular tracks from the anime.
- The game in inspired by both the anime and manga.
- There are lots of what if's; these are triggered according to how the battles go.
- Cut scenes ("Drama Pieces") are completely integrated into game play.
- The game runs at 720p (1080p not available).
- Movement is similar to the Shin Budokai series, characters can move in 3D, not just sidestepping.
- Ki is being changed a bit. Super moves like the Genkidama cannot be used over and over as these are very powerful and energy consuming attacks.
- Those little icons under the health gauge are called "Power Ups". The player will be able to choose these before a match and they'll affect the drama pieces during the fight. Example: you choose a senzu power up and another character pops up during game play throwing the senzu at you when you trigger the item.
- The graphical engine used is called "High Quality Toon Shading" and was developed for this new series of DBZ games.
- Sound is in Dolby Digital.
- Story mode is presented well and cut scenes between battles tie up the action to the point that game play does not feel like a continuous series of fights.
Source