It's time to share some new unpublished information for Sun&Moon coming from my sources. Not more of these 5 points, but I can assure that they are all true.
1. S.S. Anne returns. You will be able to go on it and to travel up to Kanto after The Rite of Island Challenge
2. All Z-moves have a base power of 120 and the, secondary effect are different for each type. In addition Z-move will be Physical or Special according to highest Pokémon statistic.
3. At a certain point the protagonist discovers that Islands Kahuna (like Hala) are evil Team Skull commanders.
4. Alola forms aren't only for first generation Pokémon. I can bring three examples: Meganium, Dunsparce and Milotic.
5. There is a sub-quest starring Zygarde Final Form, AZ and Zinnia. In this sub-quest you can travel in other dimensions with Unbound Hoopa.

It's all for now! Take note of these informations, shortly the whole world of Pokémon will be shocked...