The Maker discovers that the Multiverse is in peril due to incursions and plays a significant role in “Secret Wars,” in which he unsuccessfully attempts to take out Mister Fantastic and ends up on Earth-616, where he makes various failed attempts to gain power and is ultimately imprisoned. In “Ultimate Invasion,” the Maker breaks free and creates a new Ultimate Universe in his own image, including preventing the existence of heroes, but is defeated in a time-spanning conflict with Kang the Conqueror. His current status is unknown.
With “Secret Wars” being adapted in the Marvel Cinematic Universe as “Avengers: Secret Wars,” Marvel could really throw a curveball by slowly revealing Pedro Pascal’s Richards as the Maker in disguise. Considering Pascal’s range as an actor, he could certainly pull it off — but considering how long viewers and comic book readers have waited to see Mister Fantastic in live action alongside Marvel’s first family, introducing the Maker before Mister Fantastic would probably be a mistake.