It’s gotta be Nightcrawler is way too small. He is on Colossus’ shoulder and is barely covering him. We know Pete gets big - but not THAT big. Kurt isnt short
What I notice more than Kurt is the very strange angle/flat part of Wolverine’s claws on his left hand.
Also, is Cyclops jumping? Where is his leg? Storm and he should have been switched since can fly.
Also, is if just me or has the quality of the art being used for comic prints gone downhill since they have mostly digital based artists? Those Derrick Chew prints had whacky things. This one does. Some other did too. Lucas W does a fantastic job, so it’s not him.