Dragon Ball Z: Battle of Z isn’t being developed by Spike, who were behind the Dragon Ball Z: Budokai Tenkaichi and Raging Blast games, Siliconera can confirm.
Instead, the game is being developed by Artdink, who have worked on a number of Gundam and Macross games. You might also recognize them for Carnage Heart EXA, which Natsume recently published in the U.S.
Dragon Ball Z: Battle of Z is in development for the Xbox 360, PlayStation 3 and PS Vita. You can find out more about the game here.