I’m not inherently supposed to the concept of adapting a musical Disney property into a non-musical. I think it made sense for Mulan, even though the movie didn’t end up actually being that good.
But I think they’d be foolish to do it for Hercules. Unlike the other cases, Hercules has minimal brand power on its own; the film is remembered mostly because of its 4(?) great songs, and maybe for a couple of its supporting voice performances. Not really for the story, or for its central character.
By contrast, Mulan’s songs are perhaps equally beloved as, if not less than, the story and the protagonist.