Yes, Monica Rambeau was Captain Marvel before Carol Danvers. And no, unlike Carol, she had nothing to do with the original Captain Marvel, the alien spy-turned-hero Mar-Vell who died in 1982, the same year Monica debuted. After getting some help managing her immense, newfound powers from Iron Man, Monica was inducted into the Avengers almost immediately. She fought villains both on Earth and throughout the galaxy, not only becoming an essential member of the team, but eventually the leader of the Avengers as well. Unfortunately, her time in charge was cut short by the traitorous Doctor Druid, who manipulated her into questioning her own leadership abilities. Soon, after Druid had turned Avengers ally Marina into a sea monster (don’t ask), Monica was forced to enter the ocean, which dispersed her molecules. When she reassembled herself, she was weak, frail, and emaciated, and was forced to resign.
Yes, Monica Rambeau was Captain Marvel before Carol Danvers. And no, unlike Carol, she had nothing to do with the original Captain Marvel, the alien spy-turned-hero Mar-Vell who died in 1982, the same year Monica debuted. After getting some help managing her immense, newfound powers from Iron Man, Monica was inducted into the Avengers almost immediately. She fought villains both on Earth and throughout the galaxy, not only becoming an essential member of the team, but eventually the leader of the Avengers as well. Unfortunately, her time in charge was cut short by the traitorous Doctor Druid, who manipulated her into questioning her own leadership abilities. Soon, after Druid had turned Avengers ally Marina into a sea monster (don’t ask), Monica was forced to enter the ocean, which dispersed her molecules. When she reassembled herself, she was weak, frail, and emaciated, and was forced to resign.