I just got my Canadian Geographic in the mail and I was reading that he had planned and discussed this idea with the British. Even talking with the lieutenant governor of Upper Canada.
In this scenario, he survives Thames and the Brittish were able to put up a slightly stronger showing in the War of 1812. The war was extended through another winter and with the threat of reinforcements coming from overseas the Americans surrender.
During the peace treaty, it was exposed that the Americans did not execute a final planned assault because it was deemed futile in the case of reinforcements, and also because there were insuffient ships to blockade the Saint Lawerence, had they have occupied to the north of the river.
Because of this, the Americans were treated well at the treaty, only losing small tracts of land such as the Northwest Angle and the Upper Peninsula. Tecumesh was also recognised at the treaty as a great ally and he was able to secure a large area of land from Grand Island to around St. Catherines (or maybe even Hamilton).