Speaking of emotion...not to get too sappy, but I was hoping at the end that Wayne would have spoken with Martha Kent. I now they tried to fit in the Batman line "I failed him" when he's speaking to WW, but I feel it would have been much more impactful if he came to speak to Martha. He'd start wih....."Mrs. Kent? Pardon me, Bruce Wayne.....I'm...."
She'd at first say "I know who you are Mr. Wayne." Referring more to his celebrity et al as Wayne. Wayne would look at her more intently and say "Do you?"
Martha would look more closely at him, then come to realize he's Batman, who saved her before, as she would reply "...a friend of my Son's." And Wayne would sadly nod...then say "I'm sorry for...", having difficulty, "...I came to say...that I'm sorry....I couldn't...."
It would be a bit more full-circle with Wayne, Martha sharing the same name as his mother, Batman realizing that he was wrong about Superman and that he could have been the greatest ally in achieving what he himself wanted to do with his life...finally realizing the importance of Superman on a fundamental level. Sort of a surrogate apology to his own parents through Clark's mother et al....she's lost a husband and son, he's lost a mother and father....Superman fought to save his mother, Wayne never got that chance, and so on. And she consoles him.
I just think the idea of "I failed him" could have been more poignant and personal like that. It would maybe say more about where Bruce Wayne has gone as a person, and how he's come back, and why he has a newfound faith and motivation for putting the JL together.
Maybe that's a bit too sappy for Batman/Wayne, but really...he's still been been a scared, lonely little boy deep down inside the whole time anyway. Maybe meeting Martha was the hug that he needed......to go out and kick some more ass!
But then.....that would probably make it more of a Batman story...and we all know that this was supposed to be a Superman story.....right?