I believe it would refer to all three restaurants that offer the Fantasmic Package. They are giving you plenty of time to eat and get to the Fantasmic Show. I believe the latest adr is about 3.5-4 hours prior to the show. Since it is for the early show (if there is two in one night - not very common now), the adrs are usually early. Our usual adrs are between 4-4:45pm for an 8:30pm show. For the past 2 years, we've only reserved the Fantasmic Package at MM.
This is more important than ever now since even if you have the Fantasmic Package seats, you have to go in at least 45mins in advance. We loved the old way to do it, where we had a separate entrance. We used to get to the seats around 20 mins before and there were plenty of seats. On our last vacation, we were told that it would be best to get there no later than 45 min (and have to go through the general entrance) before because they open the reserved seat to the general seating at 30 mins. However, I'm not sure when they did do this, but at some point there were a whole crowd of people making their way over when it was close to show time. I think it's losing it's value in this case for us.