Anything is possible, I suppose. From what I understand, they didn't have a fireworks show for Sweethearts Nite this year either. It seems to me that they are moving to eliminate fireworks from after dark events, sadly.
I'm not sure I understand how the fireworks viewing from Galaxy's Edge is going to play out. The pixar show will be playing during that time frame, so if you watch from the castle/main street, you're getting pixar music? If you watch from SWGE, you're watching the same show, but hearing star wars music? Am I understanding this correctly?