Absolutely. But before the Marshall Plan, there was the Patton plan and the Eisenhower plan of kicking the invader’s ass. You can’t rebuild while Russia is still bombing the hell out of Ukrainian civilians every day, and they won’t stop until they are stopped.
https://x.com/Kasparov63/status/1943346654314119279

Here’s a "Marshall plan" Kellogg should know: "We must proceed in the most businesslike manner possible to make this war so terrible to the enemy, so overwhelming in character, that never again can a small group of dictators find a sufficient following to destroy the peaceful security of a civilized world."—Gen GC Marshall, Speech to the American Legion, Sept. 21, 1943

Or this, relevant to Russia's attacks on Ukraine: "I hope with every fiber of my being that the horrible effect on civilian communities of recent air attacks will shock the civilized world into taking joint measures guaranteeing the immunity of such communities against bombing attacks in the future."—GC Marshall, speech to the West Virginia State American Legion, Sept 4, 1938