I think it's all an illusion to get someone to eventually pay big money for the park, here's why:
The prevailing theory (and it hasn't been confirmed which is stranger still) is that the reason why Ardent could afford an i-Ride at all is because Brogent are doing a lease agreement and because of that, they're not paying a lot upfront. They get to look like they're spending big, even though they're not.
Another prevailing theory is that they had put a deposit on something before the Brogent deal was struck, and rather then waste the deposit, whatever they had planned for the cinema is just going out the back. Again, probably not going to be a big "dark ride", maybe at best a simulator (and time and time again it's been proven unless you're Universal or Disney the entire industry avoids simulators because they're hard to do well, and yet Dreamworld thinks this is their future, why? Because they've already spent the money and they need a good cover story, that's why.)
In the most basic terms, what gets people to do repeat visits over summer is the waterpark, so you could add in a lazy river or some basic slides for next to nothing in comparison to thrill ride capex (hundreds of thousands verse millions) and probably realise better profit numbers all round because people will buy more food, more merch etc. upon each revisit. It's a cheap justifier in raising prices all round when the reality is you're still not spending the same money that everyone else is spending.
The fact that they're looking into selling the land is telling - it's ultra clear they have no interest in long term expansion or adding major attractions, but to be fair that's been the case for over two decades. You know what that land could be used for? An on-property hotel and a major coaster. The fact that they're not being open about their master plan despite saying they had one and will share it when Weiss strong-armed the board last year is telling. Sounds to me like they'll be able to sell the land, make huge bank from it, and then when they sell the park they'll get a higher price because they'll be able to justify that "the new land-owners are developing x and y and will bring more value to the park's potential to serve more local tourism blah blah blah."
They're being super open about pinching pennies to realise certain numbers. Why? Gee, I wonder.