In Endwalker, they said the expansion story would end for real and start a new story in the patches. Which, technically it did, because we started to focus on the void.

I think there is certainly an opportunity to do the same with Dawntrail. To create a new story just for the patches. However, I think it will likely take place in the New World still. My guess is it will focus on the other shard.

If they go the "cleaning up" route like they did prior to Endwalker, we will go to Solution Nine and help them restore morale, install a government there and all the stuff we did with Eulmore, Doma, Ala Mhigo and Ishgard in patches, where we saw governments installed.