Odin's been pecuiliar lately, if Fear Itself is any indication, but something else is going on in the pages of The Mighty Thor. Galactus is looming over Asgard, and that's never a good sign.
However, in this case, Galactus is not simply out to devour the world. He's in search of an ancient artifact of immense power known as the Galactus Seed, and it seems Odin is in possession of it. Thus, the Allfather becomes one of the few beings who can broker a deal with the big G. A deal that might result in the annihilation of Earth.
Check out this preview art from The Mighty Thor #3, due out in June from Matt Fraction and Olivier Coipel.