Bill Foster (Marvel Cinematic Universe)

Bill Foster is a supporting antagonist in the 2018 superhero film sequel Ant-Man and the Wasp. He was portrayed by Laurence Fishburne.

Role in the film
Bill was a biochemist who was a former colleague of Hank Pym, having worked alongside him with Project G. O. L. I. A. T. H. At some point in time, he was introduced to a young Ava Starr who had lost her parents when her father attempted to continue his experiment in spite of being discredited by Hank. Ava survived the explosion, but her body cells were gravely split in half, giving her the ability to phase through objects, but at the cost of her slowly dying because of it. Bill had since become a surrogate father for her, and had spent a duration of his life finding a cure for her condition.

When Scott/Ant-Man, Hope, and Hank were captured, Bill reveals himself as working with the Ghost. The two try to steal Hank's shrunken lab so that they could use his technology to cure Ava. However, when informed that they could potentially end up killing Janet Pym by potentially absorbing quantum energy from her, Bill is willing to take that risk. Despite being more than willing to steal his former colleague's technology, he immediately berates Ava on her suggestion to abduct Scott's daughter Cassie. Eventually, Ava successfully recaptures the lab and begins to perform the experiment on herself. When Bill attempts to speak her out of this, Ava rashly throws him across the room. However, this is stopped when Pym and Janet return from the Quantum Realm, and Janet heals Ava's ailment by giving her some of her quantum energy. As Ava was attempting to escape, she suggests to Bill that he leave her because he hadn't committed any crimes she had done through S. H. I. E. L. D., but Bill refuses to leave her side. The two embrace before they both escape the authorities.

As the Pym family was disintegrated as a result of Thanos snapping half of the life in the universe out of existence, it is highly likely that Bill was one of the casualties but as of yet, it is unknown.