Well, it looks like the plan sort of worked. While Dark Bishop and Cyclone are busy getting their butts kicked out front, Thunder Girl and Enemus have gotten inside.
What they find shocks them, in different ways. Thunder Girl has probably not dealt with this kind of threat. The children laid out for some sort of sacrifice or ritual is outside her experience and horrifying. Enemus takes that all in stride. He’s walked in Hell and come out again (as we learn in the Enemus solo book). For him, it looks like a recognition of what is going on that has him worried.