I think Brook might be Coulson. If you observe closely the staff is stabbing him through the chest from behind, which this also depends on how far back in the Avengers timeline the artist is trying to depict. But listen to me probably over thinking this.... But still gorgeous art none the less
Nice work! Iron Man's Franky, isn't he? Kinda hard to tell with all that armor. I was hoping for Usopp to be in that suit, just to see Sniper King's ridiculous mask and nose poke through, but it is an amazing piece.