I noticed on cars.com there are a lot of used 2015s showing up today. Prices look a little better than they did a few weeks back but still high. Real quick look shows dealers asking for $5000 under original MSRP.
When we were shopping for the Passat in the actual year 2015, we were finding a lot of low mileage used that were priced similarly to what you're seeing today -- and of all the pre-owned Passats we test drove, the **new** one we eventually bought beat 'em all in price due to VW's $6,000 incentive that weekend.
Granted, this is two years later, but I guess I'm not surprised at this early stage in their return-to-market. I guess we'll have to see how the demand plays out.