In my opinion, CJ is the next best character to Tommy Vercetti! It'd be great to see the two of them team up. In fact, I wish there were some way you could connect all three GTA games in sequence (chronologically). Maybe that movie they never made will happen after all and do that.
It's also be nice if the so-called "racing meets", that Jethro refers to, (near the school in SanFierro) could actually be held, with the Wheels Archangels-modded vehicles, as in "2 Fast, 2 Furious"!