Reviewed by GREG KING Director: Aaron Sorkin Stars: Jessica Chastain, Idris Elba, Kevin Costner, Michael Cera, Chris O'Dowd, Bill Camp, Jeremy Strong, Graham Greene, J C Mackenzie, Brian d'arcy Jones, Natalie Krill, Jon Bass. Poker is not the most exciting of cinematic sports, although there have been a few great films set against the backdrop of poker, including Rounders, A Big Hand For A Little Lady, etc. And now we get Molly’s Game. The film is based on the memoir of Molly Bloom (played here by Jessica Chastain), a former Olympic …