Thanos sees his mission in Avengers: Infinity War as saving half the universe, and he'll need the power of all six Infinity Stones to do so.
While speaking to Entertainment Weekly, Marvel Studios head Kevin Feige revealed why Thanos is pursuing the six powerful gems. According to Feige, Thanos is influenced by what happened to his home planet and not letting that happen ever again.
“He’s from a planet called Titan that’s no longer inhabited because of things that he thought he could help prevent, and he was not allowed to do that,” Feige said. “What he feared most happened, and the planet and everybody on it basically went extinct. He vowed not to let that happen again."
As such, Thanos believes the only way to save half the universe is by killing the other half, and he'll need the six Infinity Stones to help him in his mission. The stones, when combined into a single mystical gauntlet, would allow Thanos to bend time, space, energy, and more. Thanos' minions, a race of creatures known as the Outriders, are also there to help him, and they're said to be genetically engineered.
"He thinks he sees the universe going down the tubes," Feige said. "He thinks he sees life expanding outward unchecked. That will bring ruin, he believes, to the universe and to that life. That’s either genius or horrific, depending on your point of view, and most of our point of views say it’s pretty horrific."
Elsewhere in EW's article, co-director Joe Russo described Infinity War as a heist movie since Thanos is on the hunt for the stones throughout the film. "We’re using a bit of a ’90s heist genre component. Thanos is on a smash-and-grab, and everybody’s trying to catch up the whole movie," Russo said.
Infinity War opens in theaters on April 27. Be sure to read about Bucky Barnes' new name in the film and Iron Man's new Bleeding Edge armor. Also check out why we think the Soul Stone might be the most dangerous one.
Alex Gilyadov is a freelance writer for IGN. Be sure to check out his YouTube channel and follow him on Twitter.