I love it. I hear a lot of people upset about WW trying to become human today. You should probably clarify that the "fixed" potion would only bring back his sanity, not necessarily his humanity.
Also, instead of having the potion turn him into his half-wolf form, it could instead be the thing eating away at his insanity, leaving Soraka's curse as the method for his transformation, as a lot of people seem to be upset about Soraka's lack of hatefulness. Or at the very least, have the curse accelerate the animalizing effect of the potion: Soraka didn't want to kill Warwick, so she settled for the next best thing: the destruction of his mind. Adds a nice bit of moral ambiguity to the Starchild.