Two things on this scene:
- Batman is very territorial. He never likes it when another hero comes to Gotham, even if they’re there to help. So the fact that he asked Alfred to phone in and call the entire Justice League, that’s really something noteworthy.
- We get a minor revelation on what Gotham and Gotham Girl’s actual powers are, and how they work. So there’s a trade off in the form of their lifespan, and it’s strong enough to lay waste on the entire Justice League.
From – Batman Vol. 3 #5