All of the spirits have won big this time.
The vast territory Duncan conquered, this entire subcontinent's land, as long as they don't court disaster, could sustain their faith for at least a thousand years. Even if dynasties change later, a faith that has persisted for hundreds of years won't easily alter.
Of course, the premise is there is no Monotheism, and the faith in all spirits needs to adapt appropriately.
Tenoch City.
In a grand palace, Duncan lies on a luxurious bed inlaid with gold and jewels, his hands behind his head, gazing at the distant temple pyramid. Although the statue of the Sun God Tonatiuh has collapsed, the original temple pyramid remains. Now, under the priesthood's reorganization, it's being converted into a temple for the Feathered Serpent God, Quetzalcoatl.
