The Superman moment shows so well why some people are wary of Superman. He's the man soldiers will refuse to shoot at, even when they've been duly told that he's a traitor. That's the true power shown there, imo.
Plastic Man is great and hilarious and awesome. Sissy Middle Eastern communist traitor! With no future in this army! :D Oh, Plas.
On Batman: first to say that I really love the art. One thing I love is that good depictions of Batman on Justice League always have one of his most impressive characteristic be that he can save the day with not much more than brains, bluff, and wasting time until the big guns come back. Here unfortunately it backfires into a splendid example of teamwork utterly failing.