This "expert" is either stupid or just blind.
Back in the warring states in China. 7 states exist. One is the eventual ruling state, Qin. The other six attempted an Alliance to bring down Qin through an masterful politician called Su Qin.
The Alliance on paper was stronger, but each individually was much weaker. The Qin politician used his diplomacy skills to dissolve the alliance and paved the way to eventual unification by Qin.
He used the common mistrust, the weakness of the weaker states, and used bribes, and other means to stop a few other nations. The Alliance collapsed before it even did anything meaningful.
The 6 states, were much like Europe in the sense they had much in common, as well as differences. The proposed alliance by this author has nothing, and much like BRICS, there power, interest and everything else has pretty much nothing in common, and even worse, some of these countries are developed or soon to be developed like SK, Japan and Australia, while some are pretty low on the food chain.
Moral of the story, unlike Nato where US is the undisputed leader and has command over all Allied forces, there isn't and won't be a command structure that would work in a India Japan + whatever.
India won't listen to Japanese command, and I know the Japanese won't listen to Indians, Vietnam and Philippines also won't listen to another's command, while Australia and Indonesia has at least some bad feelings, from my understanding.
With out an effective Chain of command, a mistrust between the countries, economic interests with China as well as countries friendly with China, European and American interests with China and other countries.
All these things are things that would doom any alliance against China. All China has to do is offer unification for South Korea, negotiate with Vietnam and Philippines on a common ground (they won't really want to go to war with China so the end result is irrelevent, all it needs is to delay or stop them from taking action) and the way US China trade is going, US will do all it could to hold back Japan.
India, let's face it won't move alone, Australia loves Chinese Yuan, while Indonesia, Malaysia somehow seems indifferent to the SCS issue.
No there won't be an Anti China Alliance