The destruction of the world is now upon us! Each Rider's world is beginning to merge together into our world! The Sky Wall from Kamen Rider Build appears, alongside the Futo Tower from Kamen Rider W! Not to mention all of these terrifying monsters starting to flood the city! Sougo knows he is at the center of this entire phenomenon. Sougo makes the decision to travel to the year 2068 to confront Ohma Zi-O one last time... [Source: Kamen Rider Wiki]