I believe it was on the table for New fantasyland before that. Here’s a question for anyone who has access to the measurements... could you fit the beauty and the beast dark ride into the show building of new fantasyland? I’m going to guess the answer is yes!
Edit- looks like no based on google map images. It does look like littler mermaid size attraction would fit.
Depends on if you relocate "it's a small world" to Epcot.