C'mon now man. Alduin never reached his "prophecy" levels.
He is not capable of eating the world unless his mouth unhinges like a snake, he's not a rival to Akatosh or a Daedric Prince, he's below all of the Nine Divines, he's not THAT high on the food chain.
He's Akatosh' son, and he has a lot of power and hax, but he isn't resetting creation of some crazy shit like that.
Nah, like, peak alduin literally consumed a kalpa, no cap. He's not really the son of Akatosh, he's an aspect of Akatosh, the God of Time, specifically Time's End. He Ends all of time in the Aurbis.
__________________ ”You presume limits to my power. There are none.”