It’s a little hard to tell whether the individual, or a thing, on the far right is some kind of a zombie or a young Cyclops. It’s very likely that it’s some kind of a mutant combination of both, but this is only a theory.

The two people on the left don’t appear to be aware of what’s following them, they are most certainly doomed. The person in the middle has odd look on his face, it is unclear as to why.