Why does it seem like with every new gen, the marketing team absolutely fails? I understand the choice to announce new gens on Pokémon day, and starting the news cycle that early isn't justifiable.
We usually start getting trailers about 5 months or so prior to release. Things usually go well for a month or two, with trailers that give good amount of info; enough to discuss while still wanting more. Then we get more and more information to the point where 90% of the game is revealed prior to launch.
This season, however, we've gotten much less than normal. One trailer/month doesn't seem like a lot. This might be the first gen since games were released globally that we didn't get any news in July. Seems strange.

tl;dr Gamefreak can't balance giving some info with giving too much info. No happy medium.