I get the impression that it's not possible, or at least not particularly easy, to undo that pitch change, unless you're working from the original soundtrack. If you're working from the altered version, you might get close, but I'd be surprised if you were able to match Throne's original performance.
The workprint, of course, still has the original voice, as well as parts of the "Next Week" promo (it's amazing the snippets one can find in those puppies),