Wow, these look good! Really like the colours! Especially Carnage, very dynamic (though missing a lot of the symbiote tentacles and transformed weaponry ).
Venom looks a lot like Venom should, huge and imposing and I especially like the head. But I don't know if you tried to make him hunched, but to me it does not seem like it. His abdomen seems to be on the same level as his head, causing him to just look really short from the waist up. If he would be hunched, the pelvis should be a bit back.
But apparently that's just me.