That makes little difference. Willingness to let the Soviet enpire fall was predicated on the West taking those actions, and they were already under way when the wall fell in 89
If I remember right there was a US general that wanted to go after the Soviets at the end of WWII, which probably was the best time to go after them.
There were many war plans for fighting the Soviets immediately after WWII ended. The general attitude toward them can be summed up in the code name of the most famous one - UNTHINKABLE.
Preparing for renewed war was only good sense, but nobody sane thought it was a good idea. The nuclear monopoly would only have helped so much, as A-bombs couldn't be built very fast. Even conventional strategic bombing would be difficult, because the key Soviet production was buried deep and Soviet air defenses were intact. Most importantly, Soviet ground forces were probably stronger -a lot stronger- than the immediately available forces in Europe. Even if you could maintain American support for the new war, winning it would nit be easy. The war plans were prepared primarily in the event Stalin decided to strike while the iron was hot.
The Soviets did, in fact, have such plans. They were never executed because the Allies had an overwhelming advantage in strategic strike, including atomic weapons, and no ground force advantage could knock out the United States, which was still far short of maximum war production and essentially invulnerable to Soviet attack. Their war plans were prepared primarily in case Truman or Churchill decided to strike while the iron was hot.