What occurrences had been interpreted as omens signaling the return of quetzalcoatl?

Answer;

Comet, waves in the lake, flames shot through the sky.

Explanation;

-Quetzalcoatl is often referred to as The Feathered Serpent and was connected to the planet Venus. He was also the patron god of the Aztec priesthood, of learning and knowledge.

-The return of Quetzalcoatl represents the time when the one who occupied the flying serpent in Eden, would return to occupy a physical body on earth; this time, for the purpose of reigning.