They are clearly for something else. These permits are all around the World Showcase Lagoon and they have been filing batches of permits like this for a few weeks now. If I had to guess I would say they are for the locations of Food and Wine and other kiosks.
Buena Vista Construction wouldn't be the contractor on a hotel project, and we would have seen an additional South Florida Water Management permit before we would see these notices of commencement.
... but a certain site will never let facts get in the way of a good headline.