Thanos' motivations in The Avengers: Infinity War stand revealed.
In the Doctor Strange Blu-Ray that is released today, Avengers: Infinity War co-screenwriter Stephen McFeely talks about what makes the Mad Titan tick.
"His goal is to re-balance the universe as he sees it. So when he figures out that the Infinity Stones could do this for him at the snap of a finger, that becomes his main goal," McFeely offered.
Without getting into spoiler territory, "to re-balance the universe" could obviously mean what went down in the comics when Thanos did use the Infinity Gauntlet. Suffice to say, it doesn't look good for the MCU superheroes!
The Doctor Strange Blu-Ray also featured the following Thanos concept art and Infinity War trailer featurette.
The Avengers: Infinity War has a May 4, 2018 release starring Josh Brolin as Thanos, Robert Downey Jr. as Tony Stark/Iron Man, Chris Pratt as Star-Lord, and Tom Holland as Peter Parker/Spider-Man. The following are thought/confirmed to be a part of the movie: Chris Evans, Chris Hemsworth, Mark Ruffalo, Scarlett Johansson, Jeremy Renner, Cobie Smulders, Samuel L. Jackson, Sebastian Stan, Zoe Saldana, Karen Gillan, Dave Bautista, Bradley Cooper, Vin Diesel, Paul Rudd, Elizabeth Olsen, Paul Bettany, Chadwick Boseman, Benedict Cumberbatch, Benedict Wong, and Brie Larson.