According to Atari’s latest annual report:

Fiscal 2008 — the Dragon Ball Z franchise generated 49.1% of our publishing net product revenues, driven by the November 2007 release of Dragon Ball Z: Budokai Tenkaichi 3 (PlayStation 2 and Nintendo Wii)

That is right, folks. If you really want to boil it down to the nitty-gritty, you could say that half of the money Atari makes is solely based on the Dragon Ball franchise.