Michael Douglas recently revealed in an interview that he believes his time in the MCU might be over. Now that the Ant-Man trilogy has ended, I think it's okay for the franchise to move on from Hank Pym. However, I wasn't Douglas to come back one final time. In the past, the actor had commented on how he wanted Hank to die if he were to return, and I feel like such a death could add to the stakes of the next two Avengers movies, so I hope it happens.
