These track pieces have invert or flyer written all over them!! I think Magic Mountain can be ruled out as this is super early, the are currently constructing a coaster, and they pretty much have any of the types of B&Ms that these track pieces could be used for. Altons Towers can be ruled out because I am pretty sure we would know about it as it would need approval. Also, isn't there concept photos of a possible layout of their proposed coaster anyways?(Which btw show no indication of a B&M.) And to boot, they already have a flyer and invert. I'm really not sure where this coaster could be going, however, it could very well be a Cedar Fair ride. Maverick at CP arrived super early with construction starting early as well. CP or Cedar Fair could possibly be jumpstarting construction early.
So my unofficial vote goes to a Cedar Point of Cedar Fair project.