Splash was based on a movie many in comparison had never seen because of its ban by the time 30 years of it hit. But older definitely know it as famous. It re-released in theaters not long before the ride opened. It made a healthy box office and was popular as a reissue. It actually had more success than Lady and the Tramp at the box office that same year.
But even though controversial, Song of the South was very popular. The bans came after. To the point where it was easy to replace for many reasons including the fact it was no longer widely published by company. So it is a poor example.
Current leadership would never reach that deep again with the IP edict. They would more often than not rather exploit and have multiple attractions of the same 5 or 6 properties.
Nothing outside of Star Wars, Indy, Marvel Pixar, and Mickey itself is anything they have showed wanting to peruse. When a random post frozen hit happens they have already used it. Zootopia, and Moana. Inside out still not at WDW. Which means currently, the live action well in the parks is exploited well and kind of dried up.
They need some successful live action if we are going to get much beyond animated lands, attractions and Star Wars at DHS under their last decade of goals.
The point self stands.