I've heard that the 'Howard' documentary on Disney + (the lifestory of the late Howard Ashman, who worked on many of the classic 'Disney Renaissance' films as well as 'Little Shop of Horrors' and other significant New York theater) is fantastic and knowing your interest in theater it might be up your alley.

I think there's also supposed to be some good behind the scenes Marvel content but I haven't really dug in. I admittedly fully gave into the Mouse for the unlimited access to all things Marvel, Star Wars, Pixar + other Disney animation and have kept the paid subscription, even while feeling strongly this should not exist :D