Rumours never really pointed to the black hole until this new planning application came into effect. This may not necessarily relate to the sw7 project as there is no mention of it on the application so far. This would, however mean that there would be another coaster that is not a secret weapon being built in the black hole area. This seems very unlikely and as such, indicates strongly that this is for the new sw7.
It does seem strange to put something there as it is really close to the Ropers house, which are the couple that complain all the time. Especially seeing as the tent was an enclosed space which didn't require planning consent. So unless it's some super quite coaster, or they create a bigger building to house the coaster in, I can't see them getting very far with it.
I agree, this would be a great addition to that area, as it seems to be lacking and is in some need of more/better rides. But I would have also have been happy with it being in the flumes place, but again that would have had its problems with the protected trees there. That poster found a while ago hinting that the it was going in the flumes place was probably a decoy as I've heard elsewhere that the flume is merely being rethemed.
Hopefully we will find out more when the planning portal release the planning documents and we can make more sense of it.