Similar to what seems to have been done with the Justice League origin: as I understand it, something along to the pre-Flashpoint origin is back in continuity, and the N52 origin has been retconned to be a more recent reunion of (most of) the original lineup, with Cyborg's role being retconned as him being an already established hero (with his connection to the original Teen Titans restored) who got a New Gods upgrade due to the event. I could see Zero Year similarly retconned.
And more generally, I'd prefer solutions that keeps as much history as possible, including post-Flashpoint elements. For instance, as much as I liked how Superman Reborn established a new history that nominally included elements of both pre- and post-Flashpoint, I wish it had gone a lot further: for instance, I would have rather they had kept something akin to the early N52 Action Comics and its Golden Age influences instead of the Superman Movie homage we got, as Superman's Metropolis debut.