WARNING: The following article discusses suicide and depression.

Fans are eager to see what lies in store for Mark Ruffalo's Bruce Banner in the Marvel Cinematic Universe. He's slated to appear in the She-Hulk TV show, and seeing as Thor's off-world, Steve's retired and Iron Man's dead, it'll be nice to know what one of the last members of the old guard is up to. New speculation has it Banner is also going to appear in Oscar Isaac's Moon Knight, and while it seems like an odd place for him to pop up, given the nature of both characters and the mental trauma they share, it actually makes perfect sense.

The fanbase ran rampant when Ruffalo was spotted in Hungary near where Isaac is filming the show. Ruffalo later tweeted that he wasn't going to spoil anything, clearly not wanting to be the next Tom Holland, but as expected, the rumor mill kept on going. After all, his latest evolution in Avengers: Endgame, Smart Hulk, helped snap life back into the galaxy, so folks are fixated on what he'll do next.

RELATED: A First Look at Oscar Isaac's Moon Knight Allegedly Leaks Online

Moon Knight David Finch feature

While it seems like Banner should be appearing somewhere directly tied to the Avengers, such as with Clint Barton as he and Kate Bishop chart the next era of Hawkeye, what makes Banner a solid connection to Moon Knight is their dissociative identity disorder. Moon Knight, created in 1975 by Doug Moench and Don Perlin, focused on Marc Spector -- a former boxer and military operative who was betrayed on a job. Luckily, the moon god Khonshu offered him a second chance at life in exchange for becoming his avatar on Earth. This empowered Marc to take people down, basking in the idea of vengeance, which helped fracture his mind.

He would go on to create different personalities, including the millionaire Steven Grant, who's similar to the playboy figure of Bruce Wayne, and cab driver Jake Lockley, who does things on a more grounded level, disguised as a civilian. However, Marc's struggled with keeping the personalities separate, sometimes forgetting who he is and battling to stay in control.

RELATED: Moon Knight's Ethan Hawke Shares New Details on His Mystery Villain

This is very similar to the storyline of Banner and Hulk across many comics, cartoon and movies. Banner battled his demons in the Avengers films and Thor: Ragnarok, with his Jade Giant getting the better of him first, and then eventually hiding from Thanos when Banner actually needed him. Now, though, he's in control of the Green Goliath and could help Marc curb his own voices.

There's also a much more serious approach to mental health to be considered, something akin to Netflix's Typhoid Mary, if the series portrays Marc as having thoughts of self-harm. This has notably been addressed with the Hulk, as Edward Norton's Banner tries to kill himself, only for Hulk to stop it. In that sense, Banner can become an educator and mentor to Spector, similar to what Nick Fury was. The reasoning for Hulk's presence might even be that Banner is helping scout new talent and seeing as he can relate to Marc's sensitive situation, he wants to take the mission with a hands-on approach.

Moon Knight has been elevated into the Avengers stables in the comics recently, and he has infamously brawled with Joe Fixit (aka the Grey Hulk) in the past. Thus, there's some small amount of history that informs how both men, with different personas inside, can react. This creates a way for Banner to have more agency on an MCU he saved, while allowing him to also learn from Marc as well. After all, Banner knows science and the supernatural are linked, so maybe there's something to mine that could help him too, as both men embark on this journey together.

No release date for Moon Knight, starring Oscar Isaac and Ethan Hawke, has yet been announced.

KEEP READING: Tatiana Maslany IS Marvel's She-Hulk, Ruffalo, Roth Join Cast