^From my understanding they said it wasn't a B&M at the Q&A , I also don't think anyone ever thought it would be B&M since it has been rumored from day one that it would be a launched coaster with possibly a record breaking inversion. Unless it was a B&M first (incredible hulks launch is not B&M) it has always been assumed to be Intamin or Premier since they are two of the major launch coaster manufacturers.
I believe it will in fact be an Intamin but just b/c I do watch it turn out to be a Premier
