You also realize that in terms of potential-China has the biggest potential, but US is already trying to straitjacket China to limit it to Asia, just like China has tried to limit India to South Asia.
All you need to do is setup the perfect counterweight.
China has done it most effectively by arming and aiding Pakistan. Thus India remained absorbed with Pakistan and South Asia primarily all these decades.
US OTOH, is trying to limit China, by propping up Japan militarily. You see that Japan now has a MoD, its under another ministry. But the signs are absolutely unmistakable. This was a damned huge step for Japan. Their military budget has been increasing, and signs of allowing the military back are there. US is encouraging this. They have also started helping India a LOT. This also doubly limits China. India has broken free of the South Asian straitjacket by means of sheer economic might, if India is able to maintain that, then CHina has a competitor in India, who fights for clout with China in Asia and beyond.
Then there's Vietnam, South Korea, etc, etc.
There is just one basic premise-to be a superpower in the globe, you have to be an unchallenged power in your continent. Now, you can be unchallenged by either making friends with your biggest competitor, or dominate them militarily and culturally and economically. US has that in the America's. Russia had that in the Soviet block, China doesnt in Asia.
