Reading this thread... I feel like Nintendo has become a beacon of hope in ride diversity.
I mean, if Nintendo gets 3-4 rides and none of them are screen based, it would tip the world back into balance a bit. Right now it's 6 screen rides, 4 set ones, so if Nintendo could tip that to 6 screen ones and 8 non-screen ones, it'd be a huge help to the park's balance. And there's still got to be some expansions planned for after that, and maybe those could be at least mostly set based too.
IOA already has good balance, thankfully, with mostly non-screen rides minus Spider-Man, Forbidden Journey, and soon Kong, which are all some of the best of their class. I do hope if Avengers is screen based, it's on the same tier as those 3.