Depending on how you're going to render the piece in the end you might want to desaturate the shadows of center guy(dylan?)'s clothing - especially on his shirt I feel that the dark red clashes somewhat with the darker gray you use for his jacket.
But knowing you that might just be a homage to bad coloring of old comic magazines plus a little wink to sucky shading of early 90s arcade games, dude
I say flesh out that background and give us a taste (even if it's just blobs) of what lighting you're gonna use, so we can tear that apart.
Also, I love it, fffuuuck, it looks good. Your ABILITY to construct an interesting scene is a skill I just want to absorb. It's cool, you can have my explosions, actually I think you've stolen them already.
Also burger night, fff, I want burgers.