Some quickie site analysis.
The Hong Kong Disneyland Resort is located on Lantau Island between the airport and Hong Kong. By public metro, you can easily travel from downtown to the park gate in under 20 minutes.
Lantau feels isolated, like a tropical Hawaiian island. The resort is built upon landfill in a secluded cove south of a short mountain range.
The resort is laid out tightly. Parking and public metro arrive north of Disneyland. Hotels are to the south (note one undeveloped hotel space remaining). A pedestrian corridor connects these areas. Trams travel Disneyland's western perimeter to ferry hotel guests to the northern entry area if they don't wish to walk. Intriguingly, there's an underutilized pier on the southern coast.
Note the blue area in the corridor near parking - this is the "esplanade" area which is already designed to accommodate second gate entry. At the esplanade's center is a statue of Mickey surfing atop a whale.
I think this resort layout leaves us great opportunities! The second gate expansion could include new hotels and a Disney Springs shopping district along the pedestrian corridor. The pier has great potential for
something!
And remember that it's all landfill (the expansion pad land was added after HKDL's opening), so we can expand further into the seas if we need to.