I'd absolutely love to see this, but my best guess is that the Stern guys were out in California for some other business, decided to stop by Universal to check out Harry Potter for fun, and then decided to mess with us by posting the above. Hope I'm wrong, but it's not like Stern to drop hints like this for real.
EDIT: Although I haven't been the biggest JJP fan to date I'd also prefer they got the license to Stern - but I'd rather see a Stern machine than nothing at all.