Captain Mar-Vell is a member of the Kree, the alien humanoid race which has built an empire throughout the galaxy known as the Greater Magellanic Cloud. Sent to the Earth a dozen years ago by the Supreme Intelligence to evaluate the genetic potential of the planet for possible interbreeding or genetic engineering. Disguised as a human scientist, Doctor Philip Lawson, Mar-Vell quickly found himself enchanted by the earthlings he met, and made the decision to not reveal the emergence of superhumans to the Supreme Intelligence.
When Kree General Yon-Rogg pursued the Super-Skrull to Earth, Mar-Vell was forced to stand with the Avengers against his own people. After Yon-rogg’s defeat, Mar-Vell returned to Kreespace, hoping to convince the Supreme Intelligence that Earth was too dangerous to invade, and should be left alone.