Talk:Ultraman X The Movie: Here Comes! Our Ultraman/@comment-26005152-20160721011938/@comment-27975254-20160721090714

I think X said something like "If the Earth ever gets in danger again, I'll come back and we can unite again."

Also, it has been theorized since the first Ultramanseries that transformation devices are able to summon the Ultra from wherever they are in the universe while bonding with the human host, so maybe that's the case with X as well.