In the MCU, Thor, by his own words, is about 1500 years old. How do they explain the fact that he was known in Norse Mythology for far longer?

Are you actually insisting on logical consistency in comic book fantasies? After “faster than a speeding bullet” or “more powerful than a giant locomotive”, what point is there to reference to facts.

The same way there’s always a Dread Pirate Roberts. The same way there’s always a Dalai Lama. The same way my Aunt Velma always, always had a cat named Brownie.

Actually I just made that last part up, but it might have been true.

He could have been predicted. From visions from diviners. Or time travelling of him or believers.

You caught MCU Thor in a lie. No one in the MCU is as knowledgeable about history as you are, so they haven’t caught on yet. Of course, the writers also probably don’t know, don’t GAF, and if they ever do notice and do anything about it, they’ll invent something random and probably equally arbitrary on the spot.

If there’s one thing consistent about the MCU, I’d say it’s that it is mostly d u m b, apathetic, and inaccurate about almost everything, and their Norse mythology is almost all reinvented reshuffled nonsense.

I suppose you could argue that they 1500 Asgard years, not Earth years.

MCU may say those are Thor’s own words but that is merely hearsay. Tacitus is an authoritative historical source and has been for millennia. MCU is barely 13 years old and knows nothing except how to make money.

Because Marvel’s writers don’t actually care about the mythology or the historical context of it.

Maybe Thor had forgotten how old he really is. Probably lost his birth certificate aged 500 or so, and then just lost track of the years.