Meh. Solo superhero films should be just that. No dual protagonists please. Captain Marvel needs to stand on her own. If anything I'd expect to see Jessica Drew ins minor role, since she's besties with Carol. I don't think Carol and Monica are exactly pals. I know they had that teamup a while back.
It really depends with Infinity War. It's supposed to involve EVERYONE, even the Netflix characters. How much everyone can they have in a single movie?