Premier Parks bought the Old Indiana park site after the park closed and was auctioned. Then, when Opryland became Shopryland, Premier bought most of the rides and moved them to (you guessed it) Old Indiana, in order to open the new park there. They proceeded to move the SLC to The New Marine World Africa USA Theme Park, set it up, and called it Kong. Then Premier got distracted by buying Six Flags, and so instead of becoming a park, Old Indiana has become a sort of Six Flags corporate boneyard.
I visited the site earlier this summer. I don't have the exact URL handy but there is a link to it
here to my illustrated trip report.
--Dave Althoff, Jr.