Thanos is one of the most popular characters in the Marvel Cinematic Universe. Josh Brolin brought the character to life with aplomb, painting an intimidating, yet somewhat relatable villain. So much so, the Mad Titan is now considered a massive icon in the entire realm of cinema for snapping away half of the MCU. Not that audiences condone his actions, but the pathos he had -- backed by Brolin's performance -- really set the bar high for what a tyrant based on reason should be.
Source：https://www.cbr.com/what-if-thanos-animated-series-mcu/
