Putin will pull the temple down on all our heads before he loses face. It'll take a brave colonel or someone close to assassinate him. Back when the CIA was about intelligence, instead of just "force projection" we'd have had multiple spies in the Kremlin like we did in the 80s during the Soviet area. Someone close enough to get Putin's schedule. If ever Russia needs another coup like 1917, it's now or never. There's no way Putin is going to give up the annexed territory or Crimea IMO.
As far as Finland goes, they've proven they can handle Russians during their "Winter War" preceding WWII. I wouldn't worry to much about that Mark unless course WWIII happens. Jesus, crazy isn't it? It's like "Dr. Strangelove" except it's not so funny now. How long do you think WWIII would last? 24 hours? 48? It'll be the shortest war in the history of civilization with no winners.