Today, Japanese TV show Oha Suta aired a trailer for the 18th Pokemon movie, which is set to be released in Japan on July 18th. The movie does not yet have a name; however, it is known to feature Hoopa, which has the ability to control portals, and its new “Unbound” forme.
The poster features Primal Kyogre, Primal Groudon and Shiny Mega Rayquaza next to a portal. The trailer shows a battle between these legends in ancient times, before a portal appears and sucks them in.
You can view the video below.