[Matrixbeast]

Quote:

Originally Posted by KRX

Decade must destroy the AU Rider worlds in order to save them. That's a paradox.

Kabuto changed history, but in order for those changes to remain permanent, he'd have to take the meteor back in time to Shibuya once that meteor arrives in the show's timeline. Otherwise, he'd cause a Grandfather Paradox.

No, it's not.
Note that the Rider who gave him the mission was the original Wataru, Kamen Rider Kiva. In the AU, he found a child version of Wataru, the AU Kiva.
Decade's mission was to destroy the AU Riders so that the Original Rider worlds would survive (That's why the original Riders came to kill Decade during the end).

And Kabuto's scenario isn't like that. The meteor that crashed into Shibuya was the remnants of the two meteors that collided in God Speed Love (The original, gigantic one that turned Earth into a deserty wasteland, and the smaller one that Kabuto pushed into the larger one when he traveled back in time). It's not a grandfather paradox because, as Kagami's disappearance on the pod back to Earth revealed, the timeline presented in God Speed Love ceases to exist because the circumstances that led to it were radically changed.
In short: There was no paradox because that timeline and universe (Neo-Zect, Caucasus, Ketaros, Hercus, etc) no longer exist for the paradox to occur.