Yes. But do you really think it fits with the rest of the Trailer?That was sort of the point, no? To sound childish. It is meant to sound youthful and fun, like the days when everything was filled with hope. The thing starting with Sora, Riku, and Kairi as kids playing on the beach is meant to set that tone.
I don't really think of it as part of the trailer though. I just don't really like the mix itself, regardless if it fits or not