It's true that DBZ isn't recent, but they still crank out games every year, so it'd be nice if a few didn't suck.
An Attack of the Sayians style sequel would be cool.
And yes, Superman 64 was unplayable crap. I remember my dad renting it for me, and when I started playing, I was dumbfounded at how $#@! that game was. It's insulting that a developer would even put that on the market.