Frank Grillo Jokes About Almost Being Fired By Marvel For Revealing Spoilers, But Is He Actually Returning?
The details of when/how Marvel nearly fired Grillo are largely a mystery, he spilled the beans on his role in Avengers: Endgame before Endgame even had an official title. Given the surprise nature of a dead character showing up in the past, one has to assume that was an instance that didn't please the studio.