The solicitation for Williamson's Flash Annual #3 suggests it might be setting up 5G, if the Own Mercer rumour is true.

https://previewsworld.com/Catalog/FEB200449

"From the pages of Suicide Squad, Task Force X and Captain Boomerang are on the loose, and the Flash is in hot pursuit! But is he really the hunter-or the hunted? Barry Allen may be the Scarlet Speedster, but at the end of this crossover issue, will he still be the Fastest Man Alive?"