In Avengers 3, Thanos successfully snapped his fingers and caused half of all life in the universe to disappear.
Later, the arrival of Ant-Man Scott gave everyone hope again.
Meanwhile, Wang relayed what Strange wanted to say to them.
The seventh Infinity Stone has appeared, and the Avengers plan to use 7 Infinity Stones to defeat Thanos' 6 Infinity Stones.
Conception: