Is Brad Pitt Joining "Red Dead Redemption: The Movie"?

I'm not really a big fan of Pitt, but I would love to see him in another western. And the western being the upcoming planned film adaption of the critical acclaimed, "Red Dead Redemption". WOOOOHOOOO!
The plot of the film will be about renegade outlaw, John Marston going on the hunt for his old gang. The film will also take on a type of modern western style to it.
Now, at this moment in time, this is just a massive Hollywood rumor. Nothing has been confirmed yet. The only thing that is a deffo is the film adaption of the game. But wether Pitt is in it, we don't know yet.