|Art by Robson Rocha and Scott Hanna|
The Earth 2 book is the origin of the new Batman II, which reveals his surprising secret identity and some other weirdness. As was pointed out to me on Twitter, it explicitly states that Thomas and Martha Wayne were shot in Crime Alley in 1979 which, combined with other temporal clues in the book, means Thomas Wayne was 25 when he was shot by Joe Chill, and thus 17-19 when he had Bruce, depending on whether Bruce was six or eight at the time of his parents' murder. But, Thomas Wayne was already on his residency and about to become a full-fledged doctor some time before he had even met Martha, so Thomas Wayne is essentially the Doogie Howers of Earth-2.
Something I didn't notice (nor, apparently, did editor Mike Cotton, assistant editor Anthony Marques or group editor Eddie Berganza), but a commenter on the Robot 6 did was the surname of the Rex that the dude in the panel above stole Miralco from.
This is the superhero identity of Rex Mason:
And this is the superhero identity of Rex Tyler:
While maybe not glaring (like I said, I didn't even notice while reading and even when quoting it in my review), it's a pretty big error, and one that can't be no-prized around...at least, not if they want to eventually introduce Hourman into the fledling Justice Society in Earth 2 (And why wouldnt they? Hourman is awesome).