Giant legendary mecha from past Super Sentai are summoned successively by Stacaesar. Although they overwhelm the Kikanoids with their numbers and their skill, they vanish just before the final blow can be dealt. On the ground, Barashitara summons Door World to celebrate his son's debut upon the battlefield. As a result, the Zenkaigers are scattered due to the monster's unique ability. Each time they open a door in attempts to return, they keep ending up in a place that's unfamiliar to them. (Source: powerrangers.fandom)