A correction: the Captain Marvel (DC Comics) have the powers of six Christian religion and Greek mythology figures (Solomon is religious, already the other five are mythological).
And by the way: Captain Marvel (Marvel Comics and DC Comics) are one of only three cases in that two creations of different authors or enterprises with the same original name had run problems, with the other two being Dennis the Menace (Hank Ketcham and David Law, with the second being a plagiarism) and The Ghost Busters / Ghostbusters (Filmation and Columbia Pictures).
Also, only public domain names including Scarecrow, Mercury, Sandman, Jack-o-Lantern and Thor can not give copyright problems.
Besides, one can only demand exclusivity and ownership of an artistic, business, character or story name if it is an unusual name, nothing common, unique, unprecedented
or name and surname and can not be considered identical to already existing name.
One solution to avoiding problems of not being able to do anything if you have copied names is to add, remove or modify one or more of its letters or place a complement before or after it.
Without forgetting that if someone makes an agreement with another in writing to use their name and image rights, this can only be broken if the party who requested the rights misrepresents the name and image or fails to credit the owner of them correctly, not because they do not like the way they are being used or the idea of staying the same.