I was going to say the same thing to the PP about Cars - it's Carsland inside of DCA, not a separate Cars-themed park...unless the game plan has changed? Now that would be very silly - to waste space on making a whole Carsland in one park as well as a whole new, separate Cars park as Park #3, when they could do something else for a new park and leave Carsland as is. But Carsland is supposed to be up and running way before 2015, unlike what the PP heard. It is scheduled for 2012, right, Lavender Peach (because World of Color is 2010, Little Mermaid and the Toy Story Musical are due for 2011 and Carsland comes after that, right?)?? So perhaps there is a new park in the works for 2015, or maybe they will start building Park #3 in 2015? Now, maybe a Pixar-themed park in general would make more sense, but Pixar already has a strong presence in DCA and in DL, so I don't know if a whole separate park devoted to it would detract or add to that presence.
I have not been to WDW to assess their water parks, but I can imagine that theirs are better than others (heck, they have PhotoPass photographers at their water parks!!) because they have to meet that Disney quality standard. But I would LOVE to see something really unique as Park #3. Knott's has Soak City and then there is also the one over near Six Flags. Disney has the opportunity to create a unique piece of magic with a third park, exclusive to SoCal. There will probably never be a fourth park in California. So I really want them to knock it out of the park, so to speak, and bowl us over with a third park concept, and leave us all saying, "Wow! That is a fantastic idea!" Even though we all like DCA now, at first it was not met with a warm welcome. I don't want that for Park #3. I want them to knock our socks off right from the start, and I don't think a water park will be the thing to do that. Honestly, to me, Westcot has been the best idea I have heard so far, but I think they faced too many space limitations to really do it justice and it was scrapped a long time ago.