Alright, I think that just about does it. I've worked out a list of major character who have appeared in the New 52 and a list of those not yet accounted for. Two quick notes; I purposely left off supporting characters and villains specific to one hero/comic, like Lois Lane, Iris West, or Two-Face. I figured we could all assume Commissioner Gordon and Alfred are in most of the Batmans, while Jimmy Olsen is in 'Superman' and 'Action Comics.'
And I really didn't feel like listing all of the Batman villains. If I did that, I'd have to list all the Flash villains, and then all the Superman villains, and I just don't have the time for that. However, I don't mind adding them up as people point them out. Anyway, the list is ready. Hope it helps.