I was there last night, and I can answer this for ya now. Nope, it has no pre-show music. In fact, the usual Main St. music was even off for most of the time, until Fantasmic ended a few minutes before Remember was scheduled to start.
The exit music, however, was a bit of a surprise. They first played "Remember When," which was to be expected. However, right after that, they play the pop version of "Wishes," as well!