Greenland is a big open area without any towns or nations in its northern territory. CCNet has been missing out on a Tundra assault region for a while now imo and I think Greenland is a great location for such a region.
Taking inspiration from the only other land Movecraft region, Sahara; I suggest that the reward should be the same at $3,456 and the item reward to either be 640 Ice (Useful for pot brewing) or to keep it Movecraft relevant, 64 Redstone blocks.
I also believe that similarly to North Atlantic, this region should belong to both the European and American theatres. This will promote Nations that would typically not interact such as Rome and the Canadian Dominion to duke it out over the region. This also allows the players of North America to have a region that they can fight for that doesn't have a TP, providing the opportunity for regional conflict rather than Mega-alliance-centric warfare.
As for the siege window, I suggest Saturday from 17:00 - 18:00 UTC. This doesn't overlap with any existing region and is accessible for both American and European players. being at 5:00 PM - 6:00 PM GMT and 12:00 PM - 1:00 PM EST.
The staff team has the flexibility to adjust any aspect of this suggestion as they see fit. However, at its core, I believe that creating a Tundra Assault Region situated in Greenland would be an excellent addition to CCNet.