Sega and Game Freak game developers sent a postcard to members of the press with a March 11 date and the image of a running elephant with a peanut fanny pack. The other side shows an elephant's trunk picking up peanuts and a grenade.

Nintendo, Creatures Inc., and GAME FREAK filed a trademark for "Phantom Gate" in Japan on December 6. SEGA announced separately that it will reveal an "Anime x SEGA new project" at the AnimeJapan 2015 convention on March 21.

Source: RPG Site, Lavitz11 via Gematsu