Wow, this is awesome! I love the contrast of that huge alien jellyfish thing next to the rustic farmhouse. Is that Steve in an Iron Man suit? What a cool blend of old military uniform with Tony's repulsor tech/jet boots. And I really love your sky colours, both the blue-green and the dirtier yellow. It's not quite smog or smoke--nothing seems to be on fire--so maybe just dust in the air? How did you draw the trees/bushes in the foreground? Is that a brush tool or did you do it by hand?