Was about to post a near exact post as GGG. There's already Adam Warlock teased, but whatever next big-bad after Thanos will need to be in conversation for "strongest being in the universe" when it's introduced (whether it's Galactus or some other entity). They also got the rights to X-Men now for a laundry-list of characters that could subdue her if they needed to. Or heck, even somehow-living Hela could rival her.
That's the thing with comic books, even when they bring out omnipotent characters, they can always follow it up with someone even more powerful, somehow.
But in general the problem with comic book movies is 'powers' being convenient for the plot. Okoye, Hawkeye, Black Widow, all of those guys are simply human. Even Captain America is still human, if not the perfect human, they shouldn't have been factors in battles that had beings like Odinforce Thor, Thanos, Hulk, etc. duking it out.
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