Also possible is a cover story of Wano rebuilding.
As there are going to be animal theater covers in between, the next one might well only start after Wano.
Wano under Orochi looks like a shithole. I doubt that Oda will leave his version of Japan in such a state, but its rebuild and regrowth is unsuited for chapter content as it doesn't further the plot.
Such a cover story could reveal another cryptic hint about the Void Century, like the Enel one probably did, something that can't be explained in-story is well suited for the cover-stories.