The way the white is doesn't flow well with the rest of the tag it looks to dry and plain ( the way the color is not how it looks, although i would like to see some more of that white coming out from the bottom side ). Also iron man has blue lighting on him and theres not a single hint of blue lighting anywhere in the tag. I love the background though, I just have a problem with your lighting thats all
The warmer colors make the render fit the background better in my opinion. Looking nice. As proximity says the only blue in the tag is the lighting on ironman. An idea could be to make the spotlights in the background blueish (the ones coming down from above) and then make it look like ironman has been hit by one of those spots.
i like the fire in the background on the right side a very nice idea from v1 to v2 but as the others said do a lil bit more with the lighting on him maybe nice work and idea kiu