Beta Ray Bill
Bill is a genetically-modified member of the Korbinites, an alien species that’s gone extinct. He almost appeared in the latest Thor movie, and he is highly rumored to appear in the upcoming Thor film.
He is a fan favorite, and the eventual appearance will be highly anticipated.
Squirrel Girl I think would make a great addition to upcoming Disney + Marvel series. She’s quirky, but Marvel Studios makes it work. With the way WandaVision is heading, quirky might be the new normal.
This character has gained popularity very quickly. With her set of powers and the ability to take down anyone with a bit of humor, she would make a great addition to the MCU.
Namor the Sub-Mariner is one of Marvel’s most important characters. He is also one of the oldest at 80 years. The film rights are in question, but this classic character need to make an appearance in the near future.
Namor is the perfect character to bring into the MCU. He was hinted back in an Easter egg in Iron Man 2, but we have heard nothing official since.