The latest V-Jump magazine has revealed two new characters for the upcoming fighter Dragon Ball: Xenoverse. Those characters are Super Android 17 and Super Saiyan God Goku who is teased under Super Saiyan 4 Goku.
On the left of the scan it shows that Towa can use her dark magic to make the Dragon Ball villains like Cell, Majin Buu and Frieza more evil and powerful (which is most likely part of a side story segment).
Finally, the game will have an original animation. It’s not clear if the animation is for the opening or for a certain part of the story.