Phew... that's a long name, so long that I had to shorten it in the thread title XD
It's actually Kamen Rider × Kamen Rider × Kamen Rider The Movie: Cho Den-O Trilogy
Nippon Cinema wrote:
The official website for for the upcoming film trilogy in the Cho Den-O series entitled Kamen Rider × Kamen Rider × Kamen Rider The Movie: Cho Den-O Trilogy was recently updated with a new full trailer. The three films, titled simply “Episode Red”, “Episode Blue”, and “Episode Yellow”, will be released separately by Toei over the summer.
“Episode Red”, directed by Osamu Kaneda, will be released on May 22nd. In the film, the time-traveling train, “DenLiner”, becomes impossible to control. A young version of protagonist Yuto Sakurai (Yuichi Nakamura) is forced to preserve the screwed up timeline when a rival attempts to woo his future wife, Airi Nogami (Wakana Matsumoto). Meanwhile, Momotaros also requires his assistance.
“Episode Blue”, directed by Kenzo Maihara, will be released on June 5th. Kotaro (Dori Sakurada) must deal with family issues and later sees his friendship with Teddy (Daisuke Ono) tested as they attempt to regain control of the DenLiner.
“Episode Yellow”, directed by Takayuki Shibasaki, will be released on June 19th. Daiki Kaito (Kimito Totani) returns to World of Den-O. As Kamen Rider Diend, he’s involved in the theft of the DenLiner and Rider Pass while possessed by a mysterious Imagin. He’s later pursued by a new character named Reiji Kurosaki (Yuta Furukawa), a member of the space-time police force called the G-Men.
The trailer can be found at Nippon Cinema
and the official website Cho Den-O Trilogy
P/S: Is that Diend's complete form?