I'm mostly worried because the Authority as a concept works when it's used as a commentary/contrast on traditional superheroes, but Snyder's Justice League is already informed by the Authority and so there's no real contrast there. And future movies are going to be informed one way or the other by what Snyder was doing with the Justice League characters until everyone who remembers his movies are dead I suspect.
In fact I remember a discussion with a friend back when Batman v. Superman was out that if it were an Apollo/Midnighter movie with that kind of tone and even a modified version of the same story, I'd have been on board for all of it. His vision of the Justice League was basically "what if the Authority, but instead of being Justice League expys, we used the real League characters?" (And not that she's a WW expy, but that the scene at the party would have absolutely been better if it had been Jenny Sparks instead of Diana.)
Of course, nobody was going to pay Zak Snyder to make an Apollo vs. Midnighter movie.