THR says that "Marshall-Green would swing in as an evildoer alongside" Michael Keaton's main villain, which is reportedly The Vulture.
Marshall-Green is best known for playing Charlie Holloway in Ridley Scott's 2012 Alien prequel, Prometheus. He is currently starring in Cinemax's series Quarry.
The cast features Tom Holland (In the Heart of the Sea) as Spider-Man/Peter Parker, Marisa Tomei (The Wrestler, My Cousin Vinny) as Aunt May, and Robert Downey Jr. (Avengers: Age of Ultron, Iron Man) as Tony Stark/Iron Man, and Michael Keaton (Batman, Birdman) as The Vulture. It also includes Zendaya (Shake it Up!, K.C. Undercover), Donald Glover (Community, The Martian), Martin Starr (Silicon Valley) Laura Harrier (One Life to Live), Kenneth Choi (Captain America: The First Avenger, The People vs. O.J. Simpson), Michael Barbieri (The Dark Tower), and Tony Revolori (The Grand Budapest Hotel).
The film is being directed by Jon Watts (Cop Car, Clown), based on a script by Vacation and Horrible Bosses screenwriters, John Francis Daley and Jonathan M. Goldstein.
Spider-Man: Homecoming will be released on July 7, 2017.