You have so many cheap, earlier-generation motorcycles that remain on sale in the USA that there is little reason for manufacturers to sell brand new designs there, at least during the first stages of production, when there are higher profit margins to be made elsewhere in the world such as in Europe.

As for dealers, they always say that they know nothing!
Just to add, I tend to think that this is true, broadly anyway; why should a manufacturer distract individual dealerships/distributors from selling the current range of products?
Better to let them get on with their selling business (which is distinctly separate from that of making the bikes).
In some dealerships in the UK, the sales staff are employed on what I call "zero-sales" contracts i.e. a commission only basis, so no sales = no pay in the monthly packet. That concentrates the mind on selling what they have on the shop floor and to hell with what may be coming next year when those sales staff may no longer work there in any case.

The thing that the dealers do tend to know about is which models are being dropped by the manufacturers and the sequencing that the manufacturing stops, such as the earlier AT, the Transalp, the Varadero, the Deauville - all those which were using the mighty V twin engine of some cubic capacity (did I mention the Firestorm? - a UK name for it; forgotten what it was called in the USA market, but it wasn't Firestorm).

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Dave