Board Thread:New on Pretty Cure Wiki/@comment-25034020-20161007012116/@comment-25451319-20161010004423

HengeBoy took the words right out of my mouth. Toei is already in the middle of the animal-themed Super Sentai series Doubutsu Sentai Zyuohger. I would be extremely surprised to hear that they're going to be doing an animal-themed Pretty Cure series at the same time.

So, since animals and sweets seem to be the most likely options, I'm gonna guess that we'll be getting a sweets-themed Pretty Cure series next.