User blog comment:Dodo8/New Screenshots - found on the GTA V Forum!/@comment-2053588-20130502162348/@comment-4547278-20130505022914

I thought I noticed GSF and Balla colors. I wonder if you may even have the option of choosing allegiances...?

I also doubt that Rockstar will NOT have references to previous games, they  did so in IV and SA at least. CJ will pop up in some form or fashion I'm sure.