Given the planning permission issues that Cobra and THE! EDGE! had would they actually be able to build more stuff over that area? A proper log flume would probably be a better shout than a rapids given recent events. Wouldn't be surprised if the next big big thing coincided with a retheme either. Gravity Group woodie would be a good call for next big coaster, presuming the next one is another kiddie style one (even if they have the two Zierers already).