lets rap up what we know so far....
(keep in mind I read the game informer magazine a while ago so if I miss something who cares yolo)
GTA V - 1/4 of the map is bigger than red dead redemption, gta 4 and san andreas combined. (the room to spare must be the other pieces of land)
The land will feature mountains, beaches, most likely grass fields,
There will be farms, with over 150 operating NPCs, working, throwing hay bales, operating combines, etc.
There is an underwater world, from which you can grab scuba diving kits and explore the vast ocean. (aquatic animals?? easter eggs??)
There will be a variety of animals (which you can probably kill) Dogs, cows, and so much other stuff. PETA is restricting some rights to gta v lol stuff whoresies!!
Boats, planes, helicopters, BMX bikes, street bikes, and more has all been confirmed in the game informer article. (bmx sweet :) )
(based on what i say) there will obviously be a military base, because San Diego is a main United States naval base. (there was also a military base in GTA:SA. Some more proof to back this up is the jet, I can guarentee you that you can't find a dang military jet randomly at a civilian airport. (that would be abnormally handicapped, unless it has a meaning)
I really don't feel like wrapping up the main characters because we already know alot about them....
micheal white guy ex bank robber, had a "treaty" with the FIB, or FBI....
franklin - Car repo man, black man
trevor - trashy redneck, an ex military pilot. (he may be ugly as hell, but you get to fly planes earlier than the other players!!)