Block Island Sound Confederation

This is kind of far-out, but say that Thomas Mayhew obtains a patent for Martha's Vineyard, Nantucket and the Elizabeth Islands, lands that he had purchased OTL and were later to become Dukes County, NY. Further, say that at least new Haven and Plymouth remain separate colonies. If we can still have an American Revolution similar to OTL, is there any chance that these very small colonies would confederate as one state, though still separate, for 'strength-in-numbers'. If so, how would that influence later efforts to organize the new USA?
 
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