A few days ago Variety reported about a film that is already filming:

Production has begun on “Saint John of Las Vegas,” a drama that stars Steve Buscemi, Romany Malco, Emily Mortimer, Tim Blake Nelson, John Cho, Emmanuelle Chriqui and Peter Dinklage.

Newcomer Hue Rhodes wrote the script and makes his feature directing debut.

In a loose adaptation of Dante’s “Inferno,” Buscemi plays an ex-gambler who’s under the tutelage of a maverick insurance fraud investigator (Malco). The film is shooting in Albuquerque, N.M., and Las Vegas.

Not sure how that project fits in with Ms. Mortimer’s schedule which lists another new film ‘City Island‘. Yet seeing as filming for ‘Saint John of Las Vegas‘ is expected to continue till August 23 while Emily was called to the set of the-soon-to-be-finished ‘City Island‘ as of July 31 (source: official movie blog) - it may very well be that she will shoot her scenes as a supporting character in the Inferno adaptation after leaving ‘City Island‘.