The state of Maine is funding an investment grade study to build a privately funded Interstate across Maine east to west. I expect it will run parallel to the south of the 100 mile wilderness and cross somewhere in Monson before heading west through a very undeveloped portion of Maine before hitting the border. It cuts 500 Kilometers of driving for Canadian truckers running between the Maritimes and the rest of Canada. The supporters behind it have a lot of political clout. It will be funded privately as a toll road.
A rough map is in the link.
I expect it going to raise a ruckus far more than the north woods national park proposal.