After a prerelease showing of the up-coming fifteenth Pokémon movie in Japan, Kyurem VS the Sacred Swordsman: Keldeo, a teaser was shown for the sixteenth movie which will be released sometime next year. The teaser didn't show much, but it did show a flying disk which later transformed into Genesect, a Pokémon which until now hadn't been officially revealed. Genesect is a rare Bug and Steel type Pokémon which has had some dealings with Team Plasma in the past who modified it at some stage to place a powerful cannon on its back among other things. The Pokémon has its own signature move called Techno Blast which changes type depending on which of the four special Drive items the Pokémon is holding.
It is currently unknown just how Genesect will be given to fans, but it's quite safe to bet it'll be given to tie-in with the release of the sixteenth movie much like how Keldeo is being given to fans who go and see Kyurem VS the Sacred Swordsman: Keldeo.