So, I am not good at english so forgive me for that. I want to share something not that ground breaking but it is interesting. My relative works very close to pokemon company and I think he knows thinks they do there. But he sometimes gives me details that are not in the game. He said he does it to not spoil the game for me. But sometimes he gives me legit details. And he gave me some legend z-a details too. But I don't know if he is tricking me or not. But the way he excitingly speaking about this, I think this can be real, or not. But here are the details:>Z-A will take place in Kalos region, but lumiose is the only explorable part. (Which was confirmed)
>A lot of side quest. But few of them lead to exciting things.
>There are underground caves under lumiose where story elements play out and pokemon spawns there.
>Megas are back (which was also confirmed) and this time it is integrated to the story.
>Lot of construction sites can seen around.
>Story of the game has more serious tone than legend arceus. People will talk about death and stuff more than LA's people. Even more even serious stuff will be said through out the game (which I will not explain what that is. But I can say that it is not something I think gamefreak would do. My relative kinda lost me there.)
>old mega pokemon are back except hoenn legendary. I don't know what that means. New megas are also coming.
>renovation of lumiose can be seen in the game.
>Also, an outside company is tied up with TPC to make games. Which is ILCA. (I don't know this about as well.)
These are the stuff that he told me. Keep in mind that my relative troll me sometimes. So this stuff as grain of salt. That's all.