I dunno, I think if we were going into Emerald Twilight it would've been one of next year's movies, but right after this we're probably going straight into Justice League vs. The Fatal Five continuity-wise.
I guess it's possible they'll build into it for one of the 2020 movies.
I also don't think they're going to do another reboot, soft or otherwise. They seem pretty keen on sticking with their current continuity and continuing to just pick and choose what they want from the comics for every movie rather then just wholesale lifting from the New 52, and any kind of revamp or "reboot" would be handled in-story rather then through something like Zero Hour or Crisis. I think how they're handling the Death/Reign movies are very indicative of that.