If anyone is going to do something, it has to be the people who have an immediate motivated self interest such as Georgia, Ukraine, Poland and the rest of the former Soviet states and territories who want to remain "former" and don't want history to repeat itself. Europe is lost unless or until they feel threatened enough to act...and by then it'll be too late, just like it was twice last century. The lesson they seem to have learned is to surrender until someone like the US saves them.
I agree completely. And if invited in a NATO/SEATO type organization, the US should at least consider participation. And you're right, in the short term there's noting we're going to do about it. Though we should make them aware that's not carte blanche to restore their empire. Long term, sure would be nice if people realized that domestic energy supplies are both an economic and strategic plus.