No. There's the global hegemon, and then there are the lesser regional powers that can't project force very far beyond their borders. Russia has been fighting for a decade over a relatively small piece of land that's literally directly on its border, it just isn't strong enough to even be an empire. There is only one empire under hegemony
That will certainly change in a multipolar world, but that means we can pit them against each other. Without a hegemon that can rally the entire imperial core against every revolutionary project, this new world will be one where revolutionaries can use imperialist rivalries to create space for themselves. Multipolarity is the precondition for revolution.
And in this new world, we'll need to reevaluate the contradictions. Russia is my enemy's enemy at this historical moment but in the new world I expect that to change. They are neoliberal capitalists, after all.