Alright, we've seen the trailer, now lets try and dig into the details.
- Main protagonist could be Tommy Vercetti, as the narrator sounds like Ray Liotta. This version of Tommy seems to be older.
- Another protagonist could be CJ, shown as the person running away from the police at the end of the trailer.
- If both of these characters are in the game, perhaps Claude Speed could also be in this game, as it will have all 3 characters from the GTA III series.
- It's set in San Andreas (Los Angeles).
- Los Puerta, Little Seoul and Los Santos are all places mentioned.
- The Hollywood sign reads, "Vinewood".
- It's set in roughly present time.
- There are Jets. Not sure if they will actually be player controlled at any time.
- Animals may be confirmed as there is a dog in the very first scene.
- Golfing could be an activity.
- Jet Skis are shown.
- Cars that are convertibles can either have the roof up or down, as shown when the roof is automatically reclined.
- Working out can return?
I'm going to go watch it a bit more then add to this. Feel free to add whatever you can, and hopefully I can get a little video showing the little tidbits of information?