25 acres is a postage stamp compared to other parks. The waterpark alone at SFGA Gurnee sits on 16.5 acres.....
The numbers just aren't jiving considering they want to have as many rides as stated in the article.
Given that, I also see several flat rides in the concept art: a carousel, a wave swinger, a "Dumbo" spinner. Those can be bought off the shelf for relatively little, freeing more money for the themed rides.
The layout looks to me a little like USS without the lagoon, or the Waterworld spur. (The Titanic even is in the same place as the Madagascar ship.) It's a compact, urban park. If it comes off as well as USS, it should do nicely.