I see two options - 1. multipolar world, where USA can be first among the equals, or 2. bipolar world, where USA will dominate Europe and Latin America, while China will dominate Asia and Russia. (Africa will be zone of proxy conflicts)
I think that because bipolarity is the most common for all complex structures it the most likely.
Transformation might take couple decades, best if without major war.
1. multipolar world, where USA can be first among the equals, or...
We haven't heard that one in the last fifteen years, since corrupt President Chiraq and his embarrassing prime minister de Villepain descended on the United Nations (in the runup to the Iraq invasion) to explain to us benighted American clods in condescending tones that the era of America as the lone superpower (hyperpower, unipower) was over and that the EU was the new pivot man in a global Russian/Chinese circle jerk.
And it still hasn't happened.
or 2. bipolar world, where USA will dominate Europe and Latin America, while China will dominate Asia and Russia.
You'd better phone the Kremlin. I don't think Vlad would appreciate your idea that his role in history is to be China's bitch.