Originally Posted by
vitruvian
I don't understand your argument here. First off, are you assuming that Odin knew about Frigga's plan (#1), or that he was truly trying to take care of things himself (#2)?
1) In the first case, if Odin was aware that Frigga et al were going to show up with party favors for the Fourth Host, are you saying that the Celestials would be less likely to accept the Young Gods and go away with them, had Odin not made a big show of trying to fight and kill them, to the point of being killed? I don't see where that makes sense on any level.
2) In the second case, if Odin truly thought he in the Destroyer armor was Earth's last line of defense from the Fourth Host's judgment, if he fights them and dies without leaving instructions for anybody to use Jarnbjorn under those circumstances, then nothing is amiss from the POV of the Celestials. He tries and dies, and even though Thor futilely tries to hammer them for a while (having apparently forgotten all about the axe), none of it does any good - the Celestials get to apply whatever judgment they choose to Earth.
The whole point of the story was that Odin pulled out all the stops, and it wasn't good enough, but a more peaceful approach by Frigga, Gaea, and the other mother goddesses actually worked. Introducing a new weapon that Odin didn't try to use even though it was designed for precisely these foes messes with that, unless we want to retcon it so that Odin didn't truly care about either Midgard's or even his own (and his own people's) survival.