We would
think that, especially with so much planning necessary at WDW. But then they went overboard with the original opening of GE 4 months early and 3months of 3hr EEMH at HS at 1hr EEMHs at AK/MK. Now they're playing it much closer to the cuff. Twice already they changed park close hours during that same day, and changed opening time the day before.
Definitely keep a close watch, also because that first hour of FPs become available whenever they pull back the open time. SDD would be a good one to grab