Could Sid the Sloth really play Koresh in 'Waco'?

I haven't heard much from the semi-controversial Waco flick about the Branch Davidian raid lately. Now I see the cast has gotten very interesting: Adrien Brody as Steve Schneider, Kurt Russell as FBI guy Byron Sage (whom I actually met as a reporter prior to the Branch Davidian seige), Sharon Stone as Judy Schneider and John Leguizamo as, perhaps, could it be ... David Koresh? No confirmation on the last one but he could perhaps pull it off. He is listed as in the cast without a role stated. Very interesting.

Last I heard they were looking to make the film in Louisiana.