Will we meet Diantha in Sun and Moon?

She was strangely absent in majority of the story of XY despite the fact that usually GF shoves the champions down our throat (for example Steven in ORAS or Alder in BW) and we know barely anything about Diantha.

Here's the thing: for the first time we see her in Cafe SOLEIL in Lumiose where Soleil means Sun in French. Aparently its Diantha's favourite cafe according to one of the NPCs. Another one says he'd love to see Diantha's movie where she travels with a Pokemon. Later on in the post game we meet Diantha once again in Cafe Soleil to trade Pokemon. She's also seen in Coumarine which has lots of boats just like Alola

Could it be that Diantha's role, just like Zygarde's, was kept for Sun and Moon? As a matter of fact currently in both anime and manga she's interested in Zygarde. In manga she even searches for it along with Blue. In the anime she recognizes it right away and she knows its role in Kalos mytholgy. She also stated she wants to protect Kalos and Ash