Oscar-winning Brokeback Mountain writing duo Larry McMurtry and Diana Ossana are working on two major period Western feature films projects, according to Deadline.

Larry McMurtry and Diana Ossana are scripting The Color of Lightning for Ridley Scott to direct at 20th Century Fox. Also, the duo are negotiating with Warner Bros. to adapt S. C. Gwynne's book Empire of the Summer Moon into a film that will be directed by Crazy Heart director Scott Cooper. Both projects are produced by Scott Free.

The Color of Lightning is an adaptation of the Paulette Jiles book, that centers on Britt Johnson, a freed slave who moves his wife and three children to Texas with dreams of starting a freight business. When he's away, a raiding party of Comanche and Kiowa kill his oldest son and take his family captive. Johnson spends a winter plotting revenge.

Empire of the Summer Moon is an epic about the great Comanche warrior Quanah, who held the westward expansion of settlers at bay for 40 years, and led to the formation of the Texas Rangers to fight against them.

No production dates have been set.