I have heard The new Silversea itineraries are coming out before the end of the month.
Rumors about one expedition cruise that's sounds great. Leaving from Siberia going way north to Wrangel Island (highest concentration of polar bears) and ending in Nome, Alaska. Departing mid July 2018. If this is accurate Ken and I will be doing this cruise.
Will post details when the specifics are released and I expect this to sell out fast.