Michael Douglas says he wanted Hank Pym killed off after Ant-Man and the Wasp, but the idea was not allowed.
Douglas revisited his time in the Marvel Cinematic Universe during a new Happy Sad Confused interview uploaded October 19. When host Josh Horowitz asked about Douglas seeking an onscreen death for Pym, the actor said he would have preferred it after the second film.
Source: Happy Sad Confused with Josh Horowitz.