The Sentry is an incredibly complex character on the page, and Marvel Studios both embraced and added to that in Thunderbolts*. The Void became a way for the movie to explore mental illness and depression, but also established that the villain is incredibly dangerous.

In Thunderbolts*'s post-credits scene, we learn that Bob has decided against using The Sentry again out of fear that he'll inadvertently unleash his darker half.

Talking to Cbr, The Sentry's creator, Paul Jenkins, shared his take on what might be next for the character (the comic book writer is thought to have consulted on Robert Reynolds' transition from page to screen).

"I've always tried to explain to people that like, when you write a villain, you can often agree with the villain," Jenkins explained. "You just can't agree with their methods."

"As they famously say, the villain believes their own story. They think they're the hero.