Avatar is a good start... It shouldn't be viewed as, "Oh, everything is fixed now." No, it needs more and it needs more dark rides. It's been neglected for years and has some catching up to do.
DAK isn't
just for conservation, from its inception it was supposed to include animals based on fantasy and mythology... we're still waiting for that Dragon's presence that's literally ingrained in the park's theme and decor... Mystic Manor would be an excellent fit, I agree with
@doctornick there. Where I disagree is placing it in Asia, it needs its own little island, like a Mysterious Island would have had (maybe still, at some point, in the future, please?), but it wouldn't be a big stretch to have a ride centered on mischievous monkey opening a magical box in a park with a Yeti... a Yeti who likes disco, no less.