When the end approaches for Ukraine, and when the US imperialists finally accept it's coming, that's when things will get very dangerous. There's no telling what the US might do to prolong the conflict, provoke Russia into doing something stupid, or just strike out in sheer desperation to salvage some kind of advantage.

The leadership in the West (as the recent EU top official appointments and the NATO head appointment show) is ruled by people who are primarily fanatic anti-Russians. Their decisions are based on sentiment instead of logic. So WW3 might start anyway.