I can find nothing about this. It's either an unfounded rumor or they're keeping it pretty quiet right now. It sounds similar to what Old Guy posted in Random Stuff Round-Up on May 9:
"Lost SDC Project, Silver Dollar City Outpost
This was a Early 70's experiance with roadside "Stuckies, Nickerson Farms" kind of interstate Gas Food Shop experiance and there test market was the I-44 Leasburg exit (214) between Rolla and St. Louis. It was filled with SDC crafts, Free cookies for kids, a single craft demo, restarant, and gas station. It was theamed outside with a waterwheel etc. Sold soon after, it changed hands a lot and last I saw (5 years ago) was sitting abandoned."