Erick, if you're reading this, please consider having Batman facing straight ahead or the opposite direction. It would look more aesthetically pleasing when displayed with Superman. In fact, I would prefer the Justice League NOT stare in the same direction. They should be looking around like they are assembled on a platform before a cheering audience.
Secondly, this version of Superman is AMAZING. As Ryu said "the pose of a Greek god". The portrait looks focused, determined, intense. SS really missed the boat by not having a younger portrait. One suggestion if it's not too taxing is maybe an alternate portrait where Superman is actually smiling and being warm and approachable. I grew up reading Byrne and Ordway, so this is the way he always struck me.
Of course, that portrait wouldn't work so well paired with a villain, so I'd still take the focused Superman if given a choice of one.