“Explain, please?”
Without checking the link, I’m guessing that it refers to Monica Rambeau having the name Captain Marvel before Carol Danvers. Rambeau’s powers were vastly different though. As I recall, she could transform into any type of electromagnetic energy, including light, and could travel at the speed of light. Not sure what happened but I think the Rambeau character eventually changed her name to Photon, and I think she may have disappeared from comics. Not sure about that.
Now THAT was cerebral, intelligent comic book storytelling. Reed Richards' moral dilemma about whether the heroes should fight Galactus or to instead let Galactus win at the cost of their own lives, is material worthy of any legitimate college ethics class.