Seems to be what most of us thought it was before the war ever started: try to replicate Afghanistan in the 80s. Keep Russia tied down till Russia collapses, supplying weapons and letting masses of Ukrainians die, avoiding US casualties. The country will be in ruins and not recover for decades if ever.
There are a few problems with this.
Russia is not the USSR. In many ways the USSR was stronger, but Russia is far more resilient. The USSR had a food deficit, while Russia is a net food exporter: one of the world’s largest. They still have a vast market for hydrocarbons and for their weapons. There is nothing the West can sanction that they must have. This is especially the case because while China and India have pretended to go along with the sanctions, both countries are moving into Russia in a big way to replace the Western businesses which left.