Before you send your opinions, read the damn thing, otherwise you wont understand what im talking about.
Sure the Universes are seperate, BUT that never meant the former characters never existed. When Rockstar said no characters from former universes will appear in this era, It did not mean they never existed...What they actually meant, was that The characters of This universe, NEVER KNEW The older characters..
Think of Niko for example. Niko never knew CJ, therefore he doesnt exist in His "Universe".. Packie has never spoken face to face with Tommy Vercetti as far as we know, so he's not within his universe
Id like to add the fact that OG Loc and Madd dogg are seen all throughout Gta IV, and Gta V. So Obviously they are real, and guess what? They exist in The world of Gta IV and V. If they didnt, they would have never mentioned them.
Also not to mention, CJ was on a billboard right down the street from Niko and Roman's place, and I can tell from the face, its definitely CJ. They threw that in there for reference, Therefore, CJ was "Seen" in Liberty City in 2008 on xbox 360 and ps3, by either Johnny Klebitz, Luis Lopez, or Niko Bellic depending on which character you look at the billboard with.
Grove Street, and all the gangs from the 3D universe are all alive and well, and even take part in the story in Gta V, in fact, Lamar and Franklin talked about the Grove Street Families. I mean, come on!!! The Grove Street families were SPECIFICALLY CJ and His family, and close friends on the street.
Now before you comment, just read this. what is your argument? Universes are separate, But that doesnt mean the old characters cant be in a game. Hell Maccer even got his own website these days with a HD looking model.....tell me about that