Debatable whether he can still do that or not (it's actually been debated whether he's ever destroyed a galaxy under his own power, although i tend to think he has). A prominent Marvel writer has recently said Odin can't detry galaxies. Even if he could GA Prime took a universe buster. There are trillions of galaxies in the universe.
Well, I looked, and I couldn't find it. But I did find one of Tom Breevport saying he COULD destroy a galaxies.
Q: Can Odin destroy galaxies?
A: Yes. Except that he's dead.
To answer Quan: It has nothing to do with anything, I was merely bringing up something I heard, and I happen to think the opposite anyway.
I'll look some more for it tomorrow, it's late here and I'm tired, but I'm 100% sure I saw on a forum a writer from Marvel say Odin couldn't destroy a galaxy anymore. (and again, it has nothing to do with anything. Greg Pak said WWH couldn't be stopped by anyone...and I don't believe that either).
EDIT: IT might have been posted here, but I'm too tired to look through the whole thread;
I'd caution you against it . Bada just recently closed down my thread "True Beyonders VS 5D Imps" because Mr Master presented an alleged interview with Evan Dorkin , in which Dorkin apparently implied that Mxy's feat was limited to the DC multiverse .
Since presenting such interviews with writers is against the rules , I wouldn't venture there if I were you .