Also Toussant liked Napoleon alot, and wanted to be just like him and serve him in OTL.
One minor problem: By the time Napoleon would be interested in fleeing to America, Toussaint was more than a decade in his grave, and the person responsible for his arrest and death in prison was, well, Napoleon. Under the circumstances, I doubt the Haitians would welcome Napoleon with open arms.
At the time we're talking about, Haiti was divided in two parts: the Kingdom of Haiti in the north, under King Henri Christophe, and the Republic of Haiti in the south, under Alexandre Pétion. Henri Cristophe was a former general of Toussaint's and a close ally of Britain, so the odds of him giving asylum to Napoleon are nil. Pétion was no great lover of Toussaint, and he was an internationalist who gave sanctuary to other revolutionary leaders such as Bolivar, but the Republic's 1806 constitution pretty much prohibited whites from becoming citizens, so at best Napoleon would be a guest (or maybe Pétion would send him to join Bolivar!)
And eastern Santo Domingo was still a Spanish colony at the time - the Haitian invasion didn't take place until 1822 - so Napoleon wouldn't find asylum there, nor would the Dominicans need him to help fight off Haiti.
I don't think Emperor of Hispaniola is in the cards.