I can definitely see it happening (moving it to Site B). That park is going to need a big anchor and the Zelda or Pokemon, while still big, aren't Mario. They also don't have Potter to rely on for over they unless FB gets used. They may have LotR, but I really don't think that is going to be nearly the theme park draw as Nintendo.
But who really knows. Kidzone could close tomorrow and I wouldn't be surprised or it could still be open in 5 years and I still wouldn't be surprised.