From what I know, the old Safari Area is now occupied by Flight Deck and Son of Beast. http://www.coastergallery.com/2000/pki68.html
Kings Island seemed Pretty boxed-in when I went. The only "New Section" expansion options I saw were X-Base, Removing the Crypt, and Removing Boomerang Bay. X-Base seems to have a Boatload of potential, (Cough B&M Floorless Cough), but those Ass ugly sheds have got to go. And my ride on The Beast and Snowy River Rampage Showed me that it would be extremely difficult to build back there.
You'd better rethink that one unless you want the coasters to go into disrepair. Also, they aren't that ugly since the new paint jobs.