the game is going to be released at the same time , everywhere, right?
the game is going to be released in 9 months, and this could be a ``beta ´´ trailer, so , they can make the game more detailed.
Off topic:
Pokemon Beta & Alpha, next pokemon game names
On topic:
They didn't say how many new pokemons the game will get, and which old ones will be there. Looking for the new zubat, ratata/zigzagoon/bidoof, Pidgey/starly/ tailow, geodude pokemons.