If Disney wanted to try and revive the Asian Resort concept, I think an Asian-themed take on Animal Kingdom Lodge would be interesting. Feature Asian Elephants, tapirs and yaks instead of the African animals, and feature more rainforest or Japanese gardens instead of open savanna. And the WDW resorts need some more Asian restaurants on property.
I'm sure a fine dining restaurant with sushi, or a Chinese stir-fry QSR would be a big hit.
I'm surprised Disney hasn't gone with a Hollywood-themed hotel yet; there's so much opportunity to be explored there. DHS is currently the only park without an associated hotel, and Hollywood is well-known for its palace-like hotels (the Hollywood Roosevelt, the Chateau Marmont, the Hollywood Tower, etc.). Even other Disney resorts without studio-themed parks have Hollywood-themed hotels, such as Tokyo's Ambassador Hotel and Hong Kong's Hollywood Hotel.
If I had it my way, I would have a lavish art deco or chateau-themed deluxe resort within walking distance from Hollywood Studios, positioned as Disney's new luxury resort (instead of selling off land to Four Seasons), with a few Beverly Hills-themed bungalows since Disney loves those so much these days. Then have a slightly farther, more lightly-themed streamline moderne moderate hotel (like the one in Hong Kong) perhaps a boat ride away as a moderate option.