Personally I wouldn't worry too much about pricing forecasts in the US.
Most of those 50 KISS online army machines are reserved for the sole purpose of exploiting those fanatics who will buy the machine simply because it is KISS with scant regard for the asking price.
No doubt the band will also have a number of machines reserved for themselves plus extras they can cash in on to onsell for a premium. This is Gene Simmons we are talking about remember? The man just partnered up with a cartoon dog because there was a cheque at the end of it.
Having said that though, after making a few inquiries there are still regular pinball distros in the US who have LE stock on hand at the Stern advertised* price of 8795. Note advertised as Stern has a MAP (minimum advertised price) policy that all distributors must agree to. 99% of the distros I have communicated with are more than happy to sell for far below that price in order to secure the sale. Isn't competition great?
Betson Amusements as per usual will also have bought up big on LE stock at 800 pound gorilla wholesale pricing from Stern and will no doubt sit on it until after release before slowly listing them on ebay US for well above MSRP.
I think if you are determined you won't have too much trouble securing a LE machine but your best bet is to wait until the usual pricing hype dies down before outlaying the cash.