Russia has begun to think of itself as a superpower with a little bit of power. Now he is threatening not to supply gas to other countries! For so long I have thought that if countries could not find alternatives, they would have no choice but to accept gas supplies on Russian terms.
But I got the amazing information from the link shared by @stompix. And it is only a matter of time before Russia's arrogant and aggressive attitude ends if the countries really form an alliance against Russia because of this alternative.
Although Russia will try to form an alliance with one of the countries. But, it remains to be seen whether Russia will face a single country hole against Europe. If Russia continues to threaten to cut off gas supplies, it will be a suicide for Russia.
Russia IS a superpower, the difference is that their "super" power comes from energy, which is something that could be acquired by some other nation or even become self sustaining if we spend enough time and money on it. China did the same thing, considered themselves as a superpower, reality is that the money comes from the west for manufacturing things, if we manufacture somewhere else then they are done with as well.
If you do not have money yourself, just like.. have it, then there is no way you could keep it going. I personally believe that the more you depend on other nations the less powerful you will become overtime.