Ok hear me out on this, its an open secret that when Marvel Studios and Marvel Comics start synergizing (that's the word I'm thinking of right?) with each other it's usually to promote and give more exposure to a Marvel Hero or Villain in the comics and gauge their potential for crossing over into the big pictures. They did it for Black Panther, Captain Marvel, Ant-Man; and will probably do it for Black Widow and Shang-Chi when we get closer to their movie premiers.
If this theory has any credence, then I can already name at least two marvel characters that Feige may have an eye on for the future of the MCU. With, Blade now currently on the main Avengers roster in the comics, and having a decent role in the current War of The Realms event, it may not be too far fetched to think a revival movie or streaming show on Hulu may be on the horizon.
And if exposure in the comics is any clue to who the MCU would want to introduce next, then the next Big Bad in the MCU may very well be the red devil deal maker, Mephisto. This villain has been popping up all over the place in the recent comics; Deadpool, Champions, Superior Spider-Man, and soon the main Avengers series; with more to come I'm sure of it. Now for all I know this is just the comics laying the seeds for an upcoming Marvel event next year or so. But even so if the past is any indicator then the MCU may have got eyes on this villain for some project or another. Most likely it will have something to do with the new Ghost Rider series on Hulu, but hey you never know; maybe they have their sights set for a bigger role for him in the MCU.
Anyways this is just my own loose theory, and I wouldn't be surprised if it doesn't come to fruition. But still, does anyone else have a feeling in the back of their minds that I may be on to something?