From inauspicious beginnings, Captain Marvel 's impact on the Marvel Universe still lasts to this day. Even though he's long dead. The Kree alien arrives on Earth to... well, his mission's a little unclear, but his loyalties will one-day change and turn him into a hero. Mar-Vell 's legacy is probably greater than any of the stories he'll go on to appear in. A number of other heroes have risen up over the decades, including Monica Rambeau , Genis-Vell and Carol Danvers , who also makes her debut in this story. We also meet the Supreme Intelligence and Ronan the Accuser for the very first time. As for this tale, it all begins when the Fantastic Four learn of the existence of the Kree race, then Mar-Vell and his crew arrive on Earth to convince the humans that they're a credible threat. Mar-Vell steals the identity of a dead man, infiltrates an army base and fights his own robot. Weird way to warn off an alien race... Fantastic Four #64-65 (tie-in) Thor #14