As I recall, Marvel Studios share the Skrulls with Fox (Skrull-Kree Wars with The Avengers caught in the middle) or owns it outright. Fox has Super-Skrull, though.
It’s all very confusing. Ego is a Thor baddie,but ended up with Fantastic Four & Fox because of John Byrne’s 60 issue run. There’s a great story where Thing is inside Ego’s brain with a bomb, That scene was recreated with Groot in the GOTG2 after Marvel and Fox did some swapping of rights.
Why do I know this?