OK, but what does Putin actually want?
What he says he wants is a return to the military position of ... 1998.
That is a non-starter; the problem is that bad things happens in neighbours of Russia that do not have security guarantees from outside (Georgia; Moldova; Ukraine; non exhaustive list).

The idea that the Baltic states and Poland, for example, will choose to quit NATO because Putin wants them to, seems frankly a bit far-fetched.

So ... would he settle for de-facto annexation of the occupied part of Ukraine? Or what?  

_{It is rightly acknowledged that people of faith have no monopoly of virtue - Queen Elizabeth II}