Don't worry, this one has nothing to do with Dragon Ball Evolution. This is straight-up real Dragon Ball. Anyway, Gamekyo managed to get their hands on a few scans of a Japanese gaming mag, where it was confirmed that Namco Bandai is releasing Dragon Ball Raging Blast in Japan for the PS3 and Xbox 360.
From what we can see on these scans, Dragon Ball Raging Blast will be set in the Dragon Ball Z timeline. Judging by what I think is Freeza's ship in the pic below Super Vegeta and that because the Saiyan prince is without the "M" on his forehead, I'd say this game would span from the Freeza saga to Cell's - at the very least. If they threw Buu in there, then good for them.
Dragon Ball Raging Blast, for now, is slated only for Japan, without a definite date. As far as a US release go, we'll know about localization once the Japanese release goes gold.