Abomination

A character who didn’t die, but who has been inactive for a long period of time in the Marvel Cinematic Universe, is Emil Blonsky AKA the Abomination.

Played by Tim Roth in The Incredible Hulk, Abomination was incarcerated after his defeat at the hands of the titular green hero and he has been so ever since.

Should a Masters of Evil team emerge in the MCU, it would be absolutely awesome to see them break him out of his prison and have him join them – something he would surely revel in doing, thanks to the fact that he craves power. He would provide them with muscle and a direct connection to the Hulk, giving the green brute a personal reason to fight against the evil team.