Not really. It's all just surface parking lots for the most part. The plan itself is a sound one, and it makes a lot of sense to expand both parks into those surface lots.
We've been talking about expanding DCA into the Simba Lot here for many years. It's a favorite and obvious armchair Imagineering topic. Expanding Disneyland across Disneyland Drive behind Critter Country is really the news here, but that also makes sense especially if Splash Mountain is going away and that area is rethemed for both the new ride and the bridge that leads to the expansion pad.
But the land that these two big park expansion pads are on? They are just giant surface parking lots that have been ripe for the picking for 20 years.