If Jason never died, I don't think we'd ever see Tim Drake, as there would have been much less of a reason to create him. I think instead of the brooding, loner Batman that followed Death in the Family, we'd see a brooding, overprotective Batman, who I think would try to keep Jason out of harm's way the way he tried to keep Tim out of harm's way after Tim debuted. Or maybe we'd still have a brooding, loner Batman after Batman announces "No more Robins!" after Jason's near-death, keeping Jason out of the tights until Jason saves him the way Tim did, in a new, armored costume similar to Tim's.
@awesam: You're right in that my use of weakness might have been an overstep, but so is your saying that he's resistant to magic. I should have said in my first post that Superman is vulnerable to magic (as opposed to saying he has a weakness to it). He has about as much resistance to magic as a baseline human does. Avada Kedavra would kill him.