@Ridgepole
I think you're underestimating the draw of Nintendo. Yes, none of their big games have much story depth to be found. This is true. With that being said, Mario, Donkey Kong, and the gang have been around for 30 years, and have become some of the most beloved characters on the planet. The nature of video games also offers natural attraction opportunities. I agree they shouldn't go too heavily on Nintendo, but do think that the Mario land we're getting, as well as possible Pokémon and Zelda projects, more than warrant their inclusion at UOR.
Tolkien is great. The LOTR saga is one of my favorite stories. I'd love for it to show up in Park 3. That being said, the owners of the stories don't seem keen on it coming to a theme park, so it's far from a simple thing.
I also think Narnia is no where near as popular as it was 20-30 years ago.