Checking the Disneyland.com site, they have Fireworks scheduled nightly from Friday, March 18th thru Sunday, April 3rd....
But it is interesting to see how it is listed on the Calendar....
My guess, something like Imagine, taking a mix of prerecorded music and placing fireworks to it. I really doubt they would use the new Remember soundtrack, but I wouldn't be surprised to see a few of the new effects being used for testing.
Should be interesting to see....