This is a mish mash of at least two rumors.
First as everyone has said US still owns the rights to the rides they have and are keeping them for the foreseeable future. Even if Disney acquired the rights they don't get the rides just the characters. The ride stays maybe gets repainted and becomes different themed coaster.
Second there is a proposed High speed coaster park for the area but its not a WDW park.
http://www.x.thisweekinthemeparks.com/?p=59
I think its on hold because they are trying convince the neighbors that they can control the sound pollution.