Disney used to be the undisputed masters of the animated feature, and they made some mighty fine live action films too, so when Disney movies started to flop in the theater people noticed.
Nowadays Disney's track record at the box office (not including Pixar or Marvel movies) is about fifty-fifty, which is pretty low compared to their classic days.
Movies like Mr. Magoo, Home On The Range and The Country Bears seemed destined for failure, but John Carter's failure was a surprise.
The Black Cauldron and Treasure Planet were even bigger surprises, because they both bombed hard despite being pretty great films that later got lots of love as cult classics.
That's why The Black Cauldron and Treasure Planet are also on WatchMojo's list of underrated animated Disney films, because they were sadly overlooked just like The Great Mouse Detective and Brother Bear.
-Via WatchMojo
other movies don't deserve the chitty ratings they often wind up with
I'm still a fan of Disney's "Treasure Planet" and some of the other movies listed
but even I have to admit that 2nd comming of "the rescuers" was something that should've been left as a idea and not actual movie to be funded
https://www.newgrounds.com/lit/atlantis.html