Original sentence: plays Tony Stark / Iron Man: Favreau had planned to cast a newcomer in the role, but ultimately chose Downey (a fan of the comic) because he felt the actor's past, including cocaine use, made him an appropriate choice for the part
Edited sentence: plays Tony Stark / Iron Man: Favreau had planned to cast a newcomer in the role, but ultimately chose Downey (a fan of the comic) because he felt the actor's past, including cocaine abuse, made him an appropriate choice for the part