Doing some digging this morning, I was able to find a new Vintage Collection code name “Declan” which corresponds to an as-of-yet unannounced playset or vehicle. The dimension of this item (in terms of packaging) seems to be close to previous playsets like the Tantive IV and Carbon Freezing Chamber. If it is a vehicle, the size would most closely correlate to the Imperial Troop Transport. I’ll continue to search the streets for more info and update when possible.
Update: Price is set at $59.99 so I’m going to assume this is a playset