There's NO WAY the main character is any of the protagonists from a past GTA. They've never re-used characters before, why would they do it now? Also, all the GTA games are in the same universe, I don't even know where that theory came from. Though, of course, we've seen changes in Liberty City's design and I'm sure we'll see changes in Los Santos' design. They're still the same city, same world, same universe. I think it would be pretty awesome to see CJ make an appearance. By that I don't mean "If you look in the apartment during this cutscene you can see him" I mean he actually has a semi-important part in the game, more so than Claude's cameo in San Andreas. All he did was race you and fuck Catalina.