That'd be cool but not what DC first pumped it up as. As I said DiDio specifically stated we'd be seeing the return of the JSA in it. Of course it could be the JSA existed in the early history of this new world as well. That's a possibility. The project revealed so far seems weird to me.
How is it not the return of the JSA? It may not feature the JSA as last seen or the preCrisis version, but the title/concept is returning.