The Kree
The Kree are already an established presence in the Marvel Cinematic Universe – they’ve been a major part of the various plots of Agents of S.H.I.E.L.D., and the main villain of Guardians of the Galaxy, Ronan, was a member of the species.
Given that Carol Danvers’ Captain Marvel gets her powers from a Kree source – a Kree device exploded in her vicinity, granting her various abilities – there’s every chance they could be drawn to Earth (not for the first time) in order to see what she’s all about. That would, of course, result in a battle.
The likes of Yon-Rogg – a Kree military commander who has fought Danvers in the comic books – could be introduced if this happened, which would be cool. It could also trigger things like the arrival of the Guardians of the Galaxy on Earth – something everyone’s looking forward to.
Now we’ll move on to someone who already exists in the MCU, who you might not be expecting in this movie.
