Well, Russia does have allies. I expect them to join the war in some capacity at some point. Countries like Iran, China, and North Korea. It would just take a few Fatwas and we’d be facing potentially millions of very angry Muslims, some of them remember what we did to them and some of them are battle hardened. Who knows what other countries will do as the war widens.
Most of that doesn’t sound like much of a threat.
As far as China goes, seeing what Ukraine is doing with old and minor NATO weapons and tactics against the mighty power of the Russian army must be a little sobering.
China also is seeing Russia largely erased as being helpful in serving China to tie up the West, if China starts a war.