As someone mentioned before, the old Questor building is still there and would be the perfect location for a new dark ride. They could theme it to Pharoahs and Mummies and it could just be a simple Sally dark-ride. It would also round out the Egypt section with three great attractions, a dark ride, a spinning family coaster and a high thrill invert. I think the thing is, none of these need to be large Antarcitca-style investments, they just need to be quality experiences that in the event of bad weather, people have options.
In terms of SeaWorld, there has been some discussion about using the simulator buildings of Wild Arctic to make a Sesame Street dark ride. I think it would be clever of them to take the Submarines from Submarine quest and use them in a Sesame Street underwater themed dark ride.
Sadly, it just doesn't seem like they're interested in adding much beyond coasters and (recently) flat rides. Dark rides are expensive and hard to market for a park that really doesn't have any IPs beyond Sesame Street. You can plaster Harry Potter on a billboard and people don't know/care what the ride is, they care about the character. It's easy for SWPE to plaster coaster stats ie. Tallest, fastest in Orlando blah blah to grab people's attention.
In terms of SeaWorld, there has been some discussion about using the simulator buildings of Wild Arctic to make a Sesame Street dark ride. I think it would be clever of them to take the Submarines from Submarine quest and use them in a Sesame Street underwater themed dark ride.
Sadly, it just doesn't seem like they're interested in adding much beyond coasters and (recently) flat rides. Dark rides are expensive and hard to market for a park that really doesn't have any IPs beyond Sesame Street. You can plaster Harry Potter on a billboard and people don't know/care what the ride is, they care about the character. It's easy for SWPE to plaster coaster stats ie. Tallest, fastest in Orlando blah blah to grab people's attention.