I really hope for simultaniois release, as even if it reaches American cinemas, the rest of the world will have another half a year till they release it in Japan... With such a long wait for the movie release, it would be unbearable to wait another half an year. A possible release in other countries would make it even longer as they usually push the release for after screenings are done in other countries. If the movie comes out in summer 2020, we wont be able to watch till December, unleass a miracle like with Digimon happens. Another thing for splitting it into episodes will be reaction. A guilty pleasure of mine.