Pokémon 2016
In this month's issue of CoroCoro, it has a page detailing what will be in the next issue. In this, it has a note stating that big Pokémon news for 2016 will be revealed in the issue. Typically, in the issues released in December, the first details of the next movie are revealed, but the issue doesn't clarify if this is what it is referring to. The magazine is due for release on December 15th
Source:
Serebii.net