Infinite World HD would be better than Budokai 3 HD. (It's the same thing, just improved on)
About damn time.
How have the DBZ games been this gen? I played Burst Limit and I thought it was pretty fun, but I haven't followed up on any of the other games.
Raging Blast 1 is meh
Raging Blast 2 is good enough to own, it's similar to Tenkaichi, just not as polished. Although it has it's own things that make it shine.
Ultimate Tenkaichi is like taking the Rock Paper Scissors combat from Budokai 3 and incorporating that into the entire game. Except a coin flip instead. It looks interesting, but you really don't have much control over your character. It reminds me of a Heavy Rain DBZ fighter or something.