Hmmmm.....well, we know CCL is going to get a makeover possibly next year and the rumour is it will be Lego themed.
CaTCF would not fit into that, and the building would become an entity in its own right. If they could separate the building from the burger kitchen next door and CCL then it could function as a dungeon, and dare I say it, given it's location and isolation, it could be a extra cost attraction.
However..... The majority of that building is water ride, so unless they spend a considerable amount on changing the interior, I can't see how it would work. Personally, I would have thought expanding NST would have been the more logical option but I guess the floor space there isn't enough.
A big worry however is that given the location of CaTCF, it's very isolated, would a dungeon get the footfall . I mean, how many of us venture up that area now, or indeed when CaTCF was open?