After defeating his own mother aka Kamen Rider Corona and saving the world, Percy Howard aka Kamen Rider Birthright went to Honnouji Academy in hopes of starting a new school life. But a certain trio of Kamen Riders and their team of supervillains h...
(Somewhere in the city, several citizens are seen in a cafe as they are partying. Suddenly some stomping voices are heard as a metalic dinosaur roars.)
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(It's Nemesis Grimlock, who walks towards them as the citizens start screaming and panicking as he breathes fire, burning them alive as the cafe is destroyed. Several officers and military soldiers come in as they try to stop him, but he turns into his Cybertronian Mode, and attacks the officers and military.)
(Meanwhile in Kyoto, a portal opens up and a certain mecha comes in. Inside of it, its pilot is seen as he located a problem.)
Tobias Augus (Pilot of Gundam Barbatos Lupus Rex)
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Tobias: Found it.
(He then commands his Barbatos Lupus Rex to fly away as he goes to face Nemesis Grimlock.)
(Cut to the Ocean Shore, Kamen Rider Double is seen waiting for someone, and then several individuals come in.)
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Den-O: Ore... sanjou!
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Tiger: So? Why are we here again, Double?
Double (Santiago): We're here to aid Percy in his final battle against the evil alternate Ryan tennyson.
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Akaranger: I see...
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Ichigo: Well, I guess we better get going.
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Godzilla: For Daikaiju-Verse and Megaforce-Verse!
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Ultraman: Let's do it!
(They set out to help Kamen Rider Birthright and his friends against the evil Ryan Tennyson.)
