Double WI: Martin I of Sicily and Infante Peter( of Aragon, Heir to Sicily) live

What would have happened if not only Peter of Aragon did not die in 1400 by accidentally getting a spear to his head in a tournament, but Martin I of Sicily did not die of malaria and lived to inherit the throne of Aragon? How long would the Crown of Aragon and House of Barcelona have survived with this lifeline?

What would Martin II do as King of Aragon and, if Maria still dies, Sicily?
 
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