How to Train Your Dragons (Universal's IP) and Zelda (agreement with Nintendo) are somewhat similar to LOTR in setting etc. that there's no real reason for Universal to pay a huge rights fee to use LOTR. I'd guess it's close to 100% that we'll see both Dragon & Zelda in one or two of the parks. Dragons, especially, is just about pure profit.
The worst performing of the Hobbit/LotR movies did better than the best of the HTTYD movies. By a lot. The IP's you quoted are both animated. They are not comparable to the Tolkien properties. LotR is probably the last of the non-accounted for IP's that even comparable to the HP/SW level. Obviously price matters, but if Uni could get the rights, they'd be putting it the parks.