until now I have never been interested in leaking information on pokémon games because of people who are more famous and certainly more reliable than any stranger on 4chan, but taking advantage of the fact that Khu's credibility has gone down the toilet, I would like to share the very little information that I have regarding Z-A.
I tend to point out that I am using a translator due to my linguistic deficiency in English, I apologize in advance, let's get started.
The game seems to be set in the past, but not during or after the war ended by AZ, but rather about 4-5 centuries before the events of X Y.
The city will be more developed than the village of Arceus, and we will play as a novice trainer tasked with researching the location near the city area in order to study the past of the region and the events of the war.
The game will be openmap like Arceus, but Lumiose City will be the main protagonist of the game where most of the main quests will take place.
We will see the development of the city, but what is shown in the teaser is only a future project that is only mentioned, the city will develop during the game's progress but it will never become as you imagine it or as is implied in the teaser.
The game is still in an embryonic phase, very similar to the sword and shield leaks released years ago, so it is difficult to express an opinion on graphics, gameplay or new functions, because they are currently using the Arceus models and the same animations and functions to test.
So I don't know how to give information on gameplay news.
But I can give you one thing for sure, between the end of May and the beginning of June there will be a trailer for a couple of Pokemon games for the end of this year, not developed by gamefreak, but I can't tell you if they are BW or GS, I don't want to go too far with false statements hopes and with uncertain information.