My new thought of the day is that this is a B&M. I'm sure everyone instantly thought of that when one of the clues mentioned "being so loud".
On top of that, I was looking through blueprints of past projects and the markings in the shredded paper document looks almost identical to those found on Gatekeeper. As for that "N" being on that document, I don't think that is something that we can ignore.
With that being said, I hope it isn't a WingRider but like someone mentioned, that is the B&M specialty currently. The similarity of the blueprints was originally mentioned on CoasterBuzz. Here is the picture of GateKeepers:
It is especially similar to the final helix. One more thing worth noting is how the supports are labeled... "C62L, C63L, C64L"... which indicates that the ride is coming from the top left part of the picture (I know, Captain Obvious). The thing that isn't obvious is how it relates to length since each ride requires a different amount of supports, but I think it can serve as a rough estimate of what HW's New Coaster minimum length is. Since there are about 110 (approximate) supports relating to GK's 4164', the 73 on HW's puts it at a 2763' minimum. Again, this is not an exact science by any means since each coaster is extremely different but I am just trying to do as much deciphering as possible.
I am excited to see what Robb's shredded document looks like.