FYI @actingpower, I was like you and wanted Lion King to be different from the usual Domain/Concern arrangement. I tried for a minute to see a way for the OS to be in Psychology or for the Concern to be Doing, because it's always a great learning experience to argue with Jim about a storyform.
But even just the little bits of the film I'd watched to find the Story Driver timings made it pretty clear what the OS Concern / Story Goal was. Especially when you think about Scar.
Also Simba is very clearly a Stop character with a chip on his shoulder, not a hole in his heart, so since he's a Do-er that points to the OS being internal. MC Growth can be hard to see, but in The Lion King it's quite apparent.