Maria Bakalova, the Oscar-nominated star of “Borat Subsequent Movie Film,” is set to star in the action-comedy “My Masterpiece” for Sylvester Stallone and Braden Aftergood’s Balboa Productions. Cassandra Brooksbank will make her feature directorial debut from a script by Jason Hellerman. The Veterans and CAA Media Finance will introduce the film to buyers at Cannes this week. According to the official description, “My Masterpiece” follows a hitwoman hellbent on dismantling an unfair system within her industry, who gets stuck on the second floor of an office building after she takes vengeance on a corporate overlord. That means she has to fight her way through fellow murderers and her past to ensure justice prevails. If all goes well, this might just be her masterpiece.