Unfortunately for me, I've never played either Red Dead or Bully, but I've heard good things about both and the GTA series is really well-done and enjoyable. If they did wind up making a new RD or Bully, I'd definitely get my hands on a copy. What, do you think, would the stories be about? Would they be sequels, or just set in the same universe?
There will be no sequel, just the same universe I would think. If you're planning on playing the next Bully or Red Dead, I would suggest playing the FIRST Bully and play Red Dead Redemption. Rockstar strives for originality, so I'd hope they don't make the next Red Dead some typical "shoot 'em up" western about a deranged bounty hunter. Something real and authentic, and not so far-fetched. I'm not sure about Bully though, because that was a pretty strange one (in a good way).