One that is supposedly NOT true, but I like to believe any way:
The Swan and Dolphin both have large black squares in the design in the middle of the buildings. This was supposedly because a monorail expansion was planned for Epcot area hotels, and these two hotels would have had the monorail go through them similar to the Contemporary. This area where the black square is was already designed to be demolish-able without affecting structural integrity of the building... There are a ton of sources that say this isn't true. But I wonder, why do both buildings have large black squares on them that line up perfectly with each other...