The article says that "theme park insiders" think it will be in a big-name resort/park, but that doesn't really mean it will.
I don't see it going into Disney for obvious reasons. Universal and SeaWorld are possibilities, but Universal has a lot of other major attraction rumors so I don't see them adding a Polarcoaster as well. Busch Gardens just got a super tall attraction so I don't think another one is coming soon. And I don't think Fun Spot could afford a Polarcoaster at this point.
If a Polarcoaster is coming to Florida, I'm guessing it is going to SeaWorld. Their current observation tower is pretty old and I think another coaster is in the near future for the park, so a Polarcoaster would be a great addition. However, part of me believes this will be a stand-alone attraction, so I'm not sure.