As I recall many others distrusted the “fall of the soviet union” and thought it was a fake out.
However, if there is something in the works, it might have more to do with Putin’s excessive military spending and the lack of funds in the Russian coffers. As you know, all of Putin spending is predicated on oil revenue - which is not working out so well at present; there maybe more that a few unhappy about that situation.
Putin was already committed to his current program in Syria before the crash occurred and he doesn’t feel the need to justify his actions before a wworld that began messing in his backyard in Ukraine and then causes more trouble near his Southern borders.