I'm sure Microsoft wants, I'm sure they can't too.
Whatever, if u want to play DBZ, go buy a PS3 :

http://gamers-creed.com/?p=430

Apparently an insider on the Atari forums named “Jipang” (who has been correct on these rumors many times before) has found out that Dimps (the developers of the original three Budokai games) is developing an all new DBZ series for PS3.

He even goes on to say that an all new Naruto and Gundam series is underway too and that they all may appear at TGS.
Now if you’ve been following the DBZ games then you’d know that Donny Clay (the producer of the DBZ games) confirmed in an interview LAST YEAR that they already had a PS3 game in the works. This seems to be more evidence of that.

That would be cool to see Dragonball on the ps3 with those high end graphics. But i can't wait for the one on the wii it's going to be online one on one fighting.

They are releasing it on the ps3, its not an exclusive, so its going to help the ps3 in japan sadly for the 360.