The Commonwealth of East India

I am asking the feasibility of the following timeline outside of the POD. In this timeline, the British Annex the Dutch East Indies and re-establish them as British East India. The Influx of lower class workers in the colony of Australia lead to both a less racist Australia and a more unified southeast Asia.

Eventually, following world war one, the possessions in Southeast Asia [Ceylon, Malaysia, Indonesia, Australia and New Zealand] are organized as a single large nation, the Commonwealth of East India. Is this nation possible? If not, just how close can I get to the dream of a united Southeast Asia?
 
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