Following a recent set visit on Captain Marvel, a lot of juciy info has been released.
This is what Samuel L Jackson had to say. Link to article.
She’s pretty much the strongest character -- in terms of someone with powers are able to do things -- in the Marvel universe. So, for Carol Danvers to be that person and for Brie to become that person, it's gonna be a dynamite thing. I mean, [the Avengers] are up against some really, really tough odds right now -- we saw throughout Infinity War -- so now we know that we need something that's as powerful as Thanos. And at some point, we'll find out how powerful she is and all the things that she's capable of. She's one of the few people in the Marvel universe that can time travel.