In my opinion, i thnik a gta movie would be a great idea. and if it sold enough, they could make a trilligy out of it. i can see a gta movie somewhere in the future, and i strongly hope there will be, to show more what happens in between the different games, and to show the fans more about the grand theft auto storyline.
as for eminem being in the plot, i wouldnt like that, because then the movie would seem to be more about him and his life, and not about gta.
I don't want Eminem to be a lead actor but that point you make is just stupid. How would the film be about his life?? He'd be doing what an actor those ROLE PLAYING. Hiring Eminem is just like hiring some other actor(Eminem isn't an actor though).