First, Disney doesn't sign options or contracts in its own name for something like this; it forms other entities to do so, so searching for "Disney" won't show anything. Second, nothing shows up in the tax assessor's records until the transfer actually occurs; generally Disney would tie up the property with options or contracts but wouldn't actually take title to anything until well down the road in the project. Third, although Disney announces its projects well before opening, they don't announce anything (in the U.S., at least) until they get the land under control.