Good point! Justice League is a much better comparison, and they've got the talks-to-fish guy. On the other hand, more of my audience would have heard of the Avengers. The review is far from perfect - should have run it past this board.
I didn't find the dissimilarities with the comic distracting in S1, and was pleased by how well they went - if the comic was a frame-by-frame reproduction of S1, it'd still be a very good Ennis comic. That said, I'm totally with you on S2 - Trump parallels are very obvious and all up I'm loving it too.