WI: Maori Kamehameha?

How plausible is it that a Kamehameha analogue could appear among the Maori, managing to unify at least North Island, and maybe even parts of South Island, sometime around the 1780s or early 1800s, and integrate all the iwi tribes into one unit, using pieces of captured western technology? Is Maori society and culture conducive to such a unification? And what would be the impact of a united Maori kingdom in it's dealings with the Europeans? Since the Musket Wars are butterflied away, what effects could that have?
 
Cold and cool weather tolerant sweet potatoes varieties increasing population in north island as a whole causing greater war and maybe the rise of princely states under the leadership of a king in the most fertile land maybe?

incorporation of metal and metallurgy via some blown off course southeast asian trepangers who had a blacksmith or two on board?

Later in a couple centuries a iron forging people able to readily duplicate early European guns when they become items of trade?
 
Top