Did they do anything with Wildstorm in there? I'm mostly asking because I liked that universe (all weirdness and comedy included) and then in the middle of their whole post-apocalyptic turn (which was different) they decided to just drop the whole imprint and brought some of the more popular (or ones they wanted to be popular) characters into the main DC continuity.
In part I wonder about that also because once comics start to go too "high concept" it's usually a bad sign. I think Wildstorm got cancelled in part because it went over too many people's heads (well that and they couldn't keep any decent, consistent, writers for titles like "The Authority"), I remember how Marvel started out using "Excalibur" as a way to do weirder stuff (highly multi-dimensional as well) and then turned it into a more normal "X-book" when that seemed to go over most people's heads. Then of course Marvel had "Exiles" which seems similar to this on a lot of levels, but while it had a good run, I believe that ended years ago.
I am also sort of wondering if "President Superman" is going to wind up being a bad guy in the long run. Given the PC ethnicity swap I'm guessing 'no', but it occurs to me that Lex Luthor had a run as President, and now we've apparently got Lex leading The Justice League (as this liked to). It makes me think if there is going to be a sort of "mirror effect" here in the long run. But then again that's partially because if DC is deciding to drag out some of the weirder things they have running around, they already have at least one outright good version of Lex (just using the name "Luthor") who is the arch-enemy of the Crime Syndicate Of America, and I figure there would probably be parallel version of him out there and so on, so to me it makes a certain amount of sense if they have "President Superman" he would probably just seem like a good guy (and play the role) like Lex did, perhaps being recruited by mistake, and wind up needing to be opposed by Luthor... which could then eventually fold into the current JLA storyline, since the "Real" Lex is inevitably going to go back to being a villain, but this opens the door for a good version to be in publication as a team leader if the idea proves popular.
Just an odd thought, as it just seems very "Un-Superman" to take a direct position of world leadership like that given that he's made a point about why he *won't* do things like that in the past. The realities of politics and such mean that this guy is likely not going to be the paragon of virtue that Kal-El is.
That said I'm probably overthinking things, they probably just wanted a canon black version of Superman (as in an actual empowered Kryptonian as opposed to Steel who is basically DC's version of Iron Man). I also wouldn't be surprised if Will Smith tries hard to get a movie version of it made, because allegedly he wanted to play Superman years ago, but couldn't sell people on the idea, so he made "Hancock" instead.