The land in question is the red area on the west side within the region largely bordered by Universal Blvd, Lockheed, and the Kirkman extension.
Fourth Watch is making a specific claim that Universal knew the land was under contract well in advance of Universal's purchase, and conspired with Thomas to buy the land from him anyway. I'm not a lawyer, so I have no clue whether that argument can actually create any liability for Universal.
It does seem like Fourth Watch might at least have a decent case against Thomas, although it's somewhat hard to take seriously an entity whose supposed plan was to build a 700 foot tall, half-mile long indoor ski slope.