According to Variety, Christian will be joining Mark Wahlberg in the Relativity Media project The Fighter, to be directed by David O. Russell. Production is expected to begin in July. Here's a story synopsis:
Pic tells the story of Boston fighter "Irish" Mickey Ward and how he was helped to the world lightweight championship by half-brother Dicky Eklund. Eklund once decked Sugar Ray Leonard and went the distance against the boxing legend before forfeiting his career to drugs and crime. He redeemed himself by training Ward through his Rocky-like run to the title.
Wahlberg will play Ward, a fighter who was losing bouts and was ready to hang up the gloves when his brother came back into his life. Bale will play Eklund, whose drugs and robbery spree drew him a 10- to 15-year sentence in state prison. There, he kicked drugs, became a model prisoner and emerged as a changed man who helped his brother reach the glory that eluded him