Thanos was a genocidal warlord from Titan, whose own main objective was to bring stability to the universe, as he believed its massive population would inevitably use up the universe's entire supply of resources and condemn it. To complete this goal, Thanos set about tracking down the Infinity Stones, as the combined efforts might wipe out half the universe. Thanos forged alliances with Loki and Ronan the Accuser in order to track down some of the Stones: However, both alliances cost Thanos much of his resources, including the Mind Stone and the loyalty of his daughters, Gamora and Nebula. Fed up with all of his subordinates' continued failures, Thanos forced Eitri to create the Infinity Gauntlet for him, while Thanos had opted to seek out the location of the six Infinity Stones himself.
Peter Jason Quill or STAR LORD is a Celestial-human hybrid who was abducted from Earth in 1988 by the Yondu Ravager Clan, and afterwards began building a reputation as the notorious intergalactic outlaw, nicknamed Star-Lord. In 2014, he decided to leave the Ravagers and operate individually, starting by stealing a precious artifact known as the Orb, unintentionally becoming a key player in the Quest for the Orb. Following his arrest, he forged an uneasy alliance with fellow inmates Gamora, Drax the Destroyer, Rocket Raccoon, and Groot, who together formed the Guardians of the Galaxy. They first rallied as a team by stopping Ronan the Accuser from destroying Xandar with the Power Stone.
Robert Bruce Banner or the HULK, M.D., Ph.D., is a renowned scientist and a founding member of the Avengers. As someone who was highly respected for his work regarding biochemistry, nuclear physics, and gamma radiation, he was commissioned by Thaddeus Ross to recreate the Super Soldier Serum which created Captain America, although Ross elected not to inform Banner what he was creating. However, when an exposure to high levels of gamma radiation instead of vita radiation went awry, the mild-mannered scientist had found that when angered, provoked or excited, he would transform into the huge, rage-fueled, nearly mindless creature known as Hulk.
Scott Edward Harris Lang or the ANTMAN is a former criminal who had been convinced by Hank Pym to take on the mantle as Ant Man, in order for them to then prevent Darren Cross from attempting to manipulate the Pym Particles to create extremely weapons, which he would then sell to HYDRA and the Ten Rings. Lang was trained up by Hope van Dyne and Pym to master the Ant-Man technology, before he was sent to steal the Yellowjacket Suit from Cross. However, their plan was uncovered by Cross, who managed to kidnap Lang's daughter, resulting with a final fight where Ant-Man defeated Cross by sending them both to the Quantum Realm. Ant-Man was able to survive the journey into the Quantum Realm, giving Pym hope that his wife could be saved as Lang returned into his old life, only to be told that the Avengers had learnt of him and began seeking him out.
SOURCE: MARVEL CINEMATIC UNIVERSE FANDOM
