If it's pyro that's the question, it may be good to remind some people that for a large nighttime show, they have to do testing over a period of time to make sure it's sustainable. And considering how large the Lagoon is, they may be testing pyro pads first over the next few weeks to see what they can get away with, especially if they plan on doing pyro on the roof of attractions ala FJ.
Going to guess this, and it's merely speculation: They are going to have this show ready by July or August, and that the show will be announced sometime in April or May.
Edit: Also, low-key, I'm not going to be shocked if Drupercharged is used as a launch pad on the roof, as it certainly has the space to do it with it being noticable from nearly everywhere around the lagoon.