Ross Marquand, who took on the role after Hugo Weaving decided not to return, stated that he thinks that Red Skull could make a comeback in a prominent way. In an interview with Nerds4Life, the actor opened up about what the Red Skull might be up to once he was free of his deathly shackles. Marquand further elaborated on what he thinks the crimson-head would do once he sets foot back on his home planet.
What Marquand described is very much like the role of the Watcher. In Marvel comics, the Watcher is pretty much a celestial overseer, never dipping his fingers into the course of history unless absolutely necessary. The alien beings made their first live-action appearance in Guardians of The Galaxy Vol. 2, in a cameo with the late Stan Lee. When asked whether he had been approached to play the character again, Marquand said that he hadn’t but would absolutely be down for the part. Comparing his portrayal as a cross between Hugo’s portrayal and the little green Jedi, Yoda, Marquand went on to say of the character’s newfound benevolence: So, yes, the Red Skull’s future is still very much up in Vormir. Considering the fact that the character never met his end in Avengers: Endgame, Marvel still has that ball in play somewhere in the park. Unless, of course, Steve Rogers just… GAVE HIM the SOUL STONE, and his eternal curse slid into his DM’s demanding a date with his deathly head, to which we will never know the answer.