Dragon Ball: Ultimate Butouden, or Dragon Ball Kai: Ultimate Butouden as it seems to be called in Japan, seems to be slated for Japanese release date of February 3, 2011 according to a Japanese blog. That same blog says it will be an action/fighting game for the Nintendo DS.
As you may remember, Namco Bandai Games has a Dragon Ball 3DS title in the works for the Nintendo 3DS. The Nintendo 3DS releases February 26, 2011 in Japan, so to have a regular DS title out a couple of weeks before is very surprising. The blog says they received this information from a magazine (probably Shonen Jump or V-Jump) so we hope to have more information on this as soon as it becomes available.