I say demo the attraction and use the land for other things. The footprint that attraction takes up is HUGE... if they're smart, they could probably fit an expansion of Pixar Place and another land on that space. If they're willing to consolidate some of the backstage trailers and isolated buildings to more compact areas, then you could make that 2 lands.
How does this sound:
1. Extension of Pixar Place on south side of plot, close to LMA, where the Pearl Harbor site is now (it's huge). I'm thinking Incredibles mega-dark ride, Monsters Inc coaster, and a Ratatouille restaurant.
2. A new version of Toontown on the north side of the plot, where the trailers and CM parking are now, right behind Animation Courtyard and the Walt Disney Story. This could be lifted directly from Disneyland, with Roger Rabbit's Toontown Spin, Mickey and Minnie's houses, another dark ride themed to some Disney character, maybe even a new elevated version of the Toontown Jolly Trolley.
3. If they planned carefully, this would leave a decent-sized lot in the center of the current Backlot, and in between the proposed Toontown and Pixar Place expansion. They could leave this spot open initially, but down the road could become a great area for a Marvel-themed land. If they had it surrounded by an entrance to the Incredibles ride on one side and Toontown on the other, it would flow even better. The sum of all three would make the backlot tour a distant memory.
Wishful thinking, I suppose. :shrug: