I was thinking earlier tonight about something R* said way back at the start of the whole GTA V thing when everyone was asking if we'll see Niko or Tommy etc again. This might be spoiler-like but I'm not sure.
R* said that there was a mission in the game in which you'll encounter/rescue someone from a past GTA. Not long before then, R* said that GTA 1 and 2 were one universe/timeline, while 3, VC and SA were another and IV was it's own and V is a new universe/timeline. So, how could someone from a past GTA be in V if V is a new universe?
In this same statement, which was triggered by someone asking about graffiti in GTA IV, they said that one GTA character was able to exist in multiple GTA universes, besides Lazlow. Now, I think this is who we'll see in GTA V:
El Burro. He was in GTA 1, maybe 2 I can't recall, he was also in III. There was a graffiti image of him in IV. I think he'll be in V. It makes sense if he's the only one that R* has said exists in multiple universes and he's been in 1, 2, 3 and 4 in some way.
I know it sounds crazy.