What will happen if at the end Russia succeed in her conquest against Ukraine and take over the economy of Ukraine. That will extend the economic power of Russia no doubt and that will make Russia more powerful.
If Russia can win and take control of Ukraine they will still be in trouble in the economy because of the huge cost of war they have spent it is very likely that they will become a bankrupt country, especially no matter how much resources in Ukraine, Russia will not get any benefit if it continues to have leaders who only think about war and strengthen weapons rather than build their economy.
You can see Singapore small countries with less resource but very stable on economy because have good leadership to built their economy.