Zaydon:  I can't wait for Zano's mind crumbling and his plans vanquished by me.

Trunks:  Wait, why?

Zaydon:  I want him suffer for what he did to Ghost and my........old universe.

    Trunks was confused about the "old universe" until Zaydon tells him the truth.

Zaydon:  Trunks, the truth is..........I came from another dimension where Zano destroyed you, Goku, Vegeta, and everyone else. As a child, I escaped before Zano could kill me, but I entered inside of the portal.

Trunks:  So, did you killed our Zaydon?

Zaydon:  No.........he was killed when he was drowning inside of a wormhole.