MTV spoke to director Robert Rodriguez about the next chapters of the Sin City film series that he's working on with collaborator Frank Miller.

According to Rodriguez, Sin City 2 is "based on 'A Dame to Kill For,' which has a lot of the old characters still alive because it's a prequel to 'The Big Fat Kill'".

Rosario Dawson and Jessica Alba are expected to reprise their roles as Gail and Nancy Callahan, respectively in Sin City 2.

Rodriguez also suggested that the third film will revolve around "Hell and Back," the story of Wallace, a brooding artist who, due to being drugged repetitively, wanders through most of the tale hallucinating. Johnny Depp is expected to play Wallace in the film, and although no deal is in place yet, Rodriguez in confident that the actor will sign.

According to MTV, Rodriguez stated that,"He (Depp) was interested in doing the Jackie Boy character that Benicio [del Toro] played [in the first one], but he was doing that movie 'Libertine' in Europe and it just kept getting pushed and delayed and went right through our shooting schedule," Rodriquez said of the actor he directed in "Once Upon a Time in Mexico." "But there is a better role for him in ['Hell and Back']. I kept going, 'Gosh, Jackie Boy is a small part, he could be really good [as Wallace].' When he wasn't available, I thought maybe it was meant to be."

Miller is also working to find a place in the saga for frequent Rodriguez collaborator Antonio Banderas.

"When I showed him the first sample of the work, he went, 'Man I'll do anything in that. I'll be the hunchback. You have to bring me onboard, that looks amazing,' " Rodriguez recalled. "So Frank met him that time too and he said, 'I have got to find something for that guy. I've never met him before. He's amazing.' [So we're] looking at the cast of characters and [looking] to see where he can fit."