CoroCoro to unveil new Pokémon next month
This month's issue of CoroCoro states that next month's issue will reveal a brand new Pokémon that is to appear in the ninth Pokémon movie, ポケモンレンジャーと蒼海の王子 Pokémon Ranger and the Prince of the Sea.
It is further hinted that the movie's formal title will also be announced as part of next month's coverage. As has been the tradition with the previous three Advanced Generation movies, the new title will likely consist of the featured Pokémon's name added to the end of the current title. With this in mind, it is safe to expect the Pokémon to be revealed is the Prince of the Sea, in similar fashion to last year's case with Lucario as the Wave-Guiding Hero.
Deserving of note is the narrator's remark in the teaser trailer: "Far, far away, somewhere in this sea, a legendary Pokémon that no-one has seen before is sleeping..."
Bulbanews will provide more information as it becomes available.