In the past, knights fought their archenemy Druidon using the power of ancient dinosaurs. These knights are called Ryusouger and they rode their partner dinosaurs, the Kishiryu to battle. The days of their fierce battle using the RyuSouls that house their souls unraveled. Years later in the present, the world is at peace and the tremendous power of the Kishiryu has been sleeping and sealed away. But Druidon's return draws near and the time to awaken these powers is close.
Kishiryu Sentai Ryusouger is set to premiere in 2019, replacing Kaitou Sentai Lupinranger vs. Keisatsu Sentai Patranger.
[Source: Riderdimension of Rangerboard, Matt Hunt]