New AVENGERS: INFINITY WAR Poster Shows Thanos and his Black Order

Marvel just released a new Comic-Con poster. It is quite a different poster, It doesn’t have a girl facing her butt towards the front, there is no destruction to be seen anywhere, but this focuses on just the villains. Like a team of villains all united for a cause.

The poster focuses on Thanos but the guard is ready for some fight at the bottom of the poster. You can also see the broken Avengers symbol near the guard. The only thing that I really am curious about is the green swirly stuff. Can you tell me what it is?