It seems Michael Fassbender had a different role than previously thought, and Colin Firth is considered a front runner to replace him as Aiden. Scarlett Johansson is the top contender to portray Elizabeth in Trance as well. The roles haven't been officially offered to Colin Firth or Scarlett Johansson yet. James McAvoy is locked into the project, portraying Simon.
Danny Boyle will direct Trance from his own screenplay. The story centers on an art heist that goes terribly awry. Production will begin after Danny Boyle directs the opening ceremony of the 2012 Summer Olympics in London.
Trance was released April 5th, 2013 and stars James McAvoy, Vincent Cassel, Rosario Dawson, Danny Sapani, Matt Cross, Wahab Sheikh, Mark Poltimore, Tuppence Middleton. The film is directed by Danny Boyle.