10 Huge Differences Between Marvel Movies And The Comics
9. Drax Is An Alien
In very broad strokes, Drax has the same origin in the MCU as he does in the comics. In both continuities, he is a family man who became a warrior to exact vengeance on Thanos (and Ronan in the movies) for the death of his family. The main difference between the two though is what species Drax is.
While Drax may be an alien in the MCU, he is actually a human in the comics. Arthur Sampson Douglas was driving through the desert one night with his wife and daughter when they came across a spaceship. The ship belonged to Thanos and he seemingly killed the three to keep it a secret.
Thanos' father Mentor saw what happened though and resurrected Arthur in a new superhumanly strong body (which was also green, presumably from all the vegetables he ate to get that big). Now existing only to kill Thanos, he was rechristened Drax the Destroyer and set off on his mission.
It was later revealed that Arthur's daughter Heather also survived and was raised by Mentor to become the psychic hero Moondragon, who also joined the Guardians of the Galaxy for a time.