There are already three Disney hotels “in” a park. There’s be no need for a luggage check window. There would be a lobby just like every other hotel.I will take a wild guess and say they may use the area behind disney play pavilion. As for how guests would get in, they would probably start with checking their luggage at a separate check in place using one of the old ticket windows at the front of the park. . Guests would then leave their luggage and enter epcot through a seperate entrance for hotel guests. When guests are ready to head to their room they will head to the play pavilion where there will be an entrance and a walkway to the hotel. Barring any issues the luggage should be at a check in windows once you enter the hotel. Now there will be two kinds of rooms. The specialized suites and the deluxe suites. The specialized suites will be designed around a theme relating to an attraction at epcot. A few themes that come to mind are Finding Nemo, Guardians of the Galaxy, Mission Space, Figment, innoventions, and classic epcot. The window will instead be replaced with a video projection of a different set of scenes depending on the theme of the room. Now the deluxe suites will be towards the top with a spectacular view of the fireworks. There will also be restaurant/viewing area at the top for watching the fireworks as well. As for the pool, they will have it indoors thus keeping the theming active. When its time to check out you can have your luggage once again delivered to the front while you get some last chances to wander around epcot before heading to the front to get your luggage. Its a plausible option in all honesty and if they used the existing parking system they could theoretically keep things pretty much normal without too much major changes to the landscape.