The thing is ne and all the norse gods knew it was coming when Fenris would swallow the sun.
I havent read that Fenris ends up eating Odin,thought TYR was to deal with the wolf while Thor took on the giant - have forgoten who Odin was to fight.
But the Vikings wheren't all doom and gloom though -the gods will be re-born as will man and woman.
And how sad diney had all the best happy endings