Sounds like mostly a marketing ploy, to promote what they're already doing.
We know Shazam, JSA, Legion won't relaunch until Doomsday Clock wraps up. And they'll want momentum behind those launches.
Doubtful they would do any more continuity tweaks until after D-Clock wraps up as well.
New Age of Heroes wouldn't be wrapped up yet, as a couple of titles have just barely launched.
Honestly I'm just counting down the months until we CAN get a new JSA, Legion, and Shazam. Those are the books I'd run out and buy screaming "take my money please!!!!". They've already ruined my favorite title (Titans, soon to become the Unrecognizables) and cancelled my other favorite Super Sons. I guess I'm a "wait and see" vote on any Fresh Starts.