I agree with 1dbad and Platinum fan.

An anime adaption can't be created when what they're trying to specifically adapt isn't finished. Manga-anime adaptions are always created when the manga is far ahead to avoid overtaking; since anime episodes would come out more often than the actual chapters themselves the PokeSpe anime would overtake in no time. That would lead to more filler and anime originals than actual content. If they do an anime, they might as well just start from the beginning to just get it over with. Who knows what Kusaka might do to link older characters/arcs. Plus, there is no good arc to start it from that won't run into the problem of overtaking or having to go onto hiatus (which barely happens)...

If they were going to start a PokeSpe anime on some random arc just to try and make money, I rather them just not make an anime at all.