The
official Japanese Pokémon Movie website has updated to announce that Pokémon The Movie XY 2 will be released in theaters in Japan in the summer of 2015. A brief teaser trailer was also posted which featured Primal Groudon and Primal Kyogre. This is the same teaser trailer was shown at the end of this
years movie.
Source:
http://www.pokemon-movie.jp/