I was just thinking when was the last time that the Disneyland Resort received a completely unique, totally immersive attraction that wasn't based off of a Disney film or a Pixar film? I'm talking about the ones like Tower of Terror where they had to create and design a totally new story (with the backdrop of Twilight Zone).
Not to say the Disney and Pixar attractions aren't creative and immersive. I just think the Disney Imagineers shine the most when they are making attractions completely out of their own imaginations. The most recent of these has been Mystic Manor at Hong Kong Disneyland. But I want to pick all of your brains on the attraction that was made for Disneyland Resort and not brought here from another park, like Tower of Terror.
The only attractions that come to mind that were most recent have been the California Adventure rides, like Screamin', GRR, Soarin' Over California. And even some of those aren't fully immersive like Tower.
Have any of you guys thought up a unique experience or attraction that would fit well in one of these two parks?