So, slight update, Toei have announced that the official translation of the show's name is Ryusou
lger.
They have also made some staff announcements:
The producers will be Maruyama Shinya and Takahashi Kazuhiro. Shinya has mainly worked in more 'mainstream' Japanese television, and their only previous toku experience was on a few episodes of the toku adaptation of Sailor Moon. Kazuhiro has had more experience of toku, most notably as a main producer on Kamen Rider Fourze.
The head writer will be Junpei Yamaoka, who has never worked in toku before.
The head director will be Kazuya Kamihoriuchi, who has directed a few episodes of Ex-Aid, Build and Zi-O but has (as far as I can tell) never worked on Sentai before and this is their first time as lead director.
Music will be composed by Kiyoshi Yoshikawa, who again has had lots of experience in the TV industry but is new to toku.
Toei's official synopsis for the show,
as translated by The Tokusatsu Network:
65 million years ago
An era when dinosaurs were everywhere. When attackers sought to take over the world, bringing war, knights were selected to stand against this threat. A meteor falls to the earth and brings the era of the dinosaurs to an end. Those chosen knights then chose to live the rest of their lives quietly on earth. In preparation for the return of this enemy, dinosaurs with great power were made to sleep in a temple.
Now, at the end of the Heisei era, the attackers have returned to Earth, pushing their evil to the limits of the universe. Now, it’s time to grasp the powers of the dinosaurs!
“Knights” x “Dinosaurs”
Now is the time to protect earth’s peace with that power!
(TV Asahi)
65 million years ago, the immensely powerful Druidon Tribe reigned over Earth. The tribe abandoned the planet when a gigantic meteor approached, vowing that they would return as the rulers of the world again as they headed into space.
The Ryusou Tribe who battled against the Druidon Tribe stayed on earth, along with their dinosaur companions, the Kishiryu. The Ryusou Tribe withstood the ice age brought on by the gigantic meteor. They placed their Kishiryu companions into the Ryusouls and sealed them in temples throughout the world.
Time has moved on and the Druidon Tribe has returned after fighting in harsh environments across space, totally increasing their powers. The Ryusou Tribe that kept the Earth safe in the past have selected new knights: the Ryusoulgers. They have been revived by their mission as the battle against the Druidon Tribe begins.