The prospect of DC returning to the pre Flashpoint continuity isn't all that unprecedented. In fact after Infinite Crisis, the Legion of Superheroes after more than a decade of reboots, saw the return of their original iteration before the Baxter series. At the time that was 22 years ago. Flashpoint was comparatively 9 years ago.
A great deal of DC's fans were disgruntled with the company wide reboot and setting back the timeline less than 10 years would be a faster way of bringing back elements of the old DC Universe that fans miss.
I'm not saying throw out the New 52 entirely, but those stories can be relegated to a seperate Earth.