The petition is clearly written with tongue planted firmly in cheek, poking fun at Disney Parks’ recent tendency to retheme attractions not specifically based on Disney IP into attractions that utilize popular Disney and Pixar characters.
While looking for something else on Change.org I tripped over this petition from earlier this year, which is hilariously asking Disneyland to retheme the Matterhorn Bobsleds into Cool Runnings: The Movie: The Ride.
If Maelstrom needed to become Frozen Ever After, then obviously the bobsled ride at Disneyland needs to call back to Cool Runnings.