I did see an outside-the-box strategy from TP: From Pop get on a bus heading to DAK, then walk to the bus pick up area and get on a bus heading to Boardwalk/Yacht Club/Beach Club, then walk from that resort to HS. Because DAK opens at 8am, busses will be running by 7am, so even with the bus transfer and walking, you can make it to Hollywood Studios before the Skyliner starts running and before cars are allowed into the HS parking.
Granted, an Uber would be MUCH more direct, but for those who don't want to spend the money or have other issues (need carseat, have mobility
scooter, etc.) this could be better than getting in line for the skyliner and hoping for the best. Considering trying it myself when we are at Pop next week.