Originally Posted by
JKtheMac
This is exactly what it ISNT like. This is a 'trope based criticism' it is effectively an accusation that Odinson is suffering from plot amnesia. But he isn't. He is applying straightforward logic. He knows the stories about the forging of Mjolnir. He knows it was supposedly forged in a star. It didn't become a hammer without being fashioned. It isn't invulnerable. It can be melted down and it can be destroyed by a star, just as an iron sword would be destroyed if left in a furnace too long. Mjölnir hasn't just been sent into the sun to place Mangog there, it has been sent into the sun to hold him there. I very much doubt Mangog will come back in Aaron's run, that might indicate Mjölnir won't either. Jane knows full well that although the world needs a Thor, that Odinson doesn't need Mjölnir to be that Thor.
Odinson has only very recently even discovered that Mjolnir may have this extra sentience. Something he had only had tiny hints of in his youth. So his perspective on it being alive in the first place is somewhat confused and not based on any real knowledge. He didn't say "You have destroyed Mjölnir, he suggested Thor had killed it. That to him would be a very vague and unclear concept, just as it has been throughout canon. So again, unclear and canonical knowledge, not plot amnesia.
We don't even know what that could mean in the long term. Aaron may not even be clear on this. He may just be leaving options open to future writers way down the line. We don't even know if he plans to bring back Mjölnir in the remains of his run, or if he does, whether it will still be sentient. I would imagine there is a distinct possibility Mjölnir will be back towards the end but it might be gone for years. He may have deliberately left it for others to decide.
What this boils down to is the same thing everyone says when a major character dies. 'How boring, we know they will be back'. This has always been a somewhat strange criticism, and these days not as true as it used to be. The reason for characters returning is partly for IP reasons, and with Movies and TV and their related comics, and with cartoons, also with related all ages comics and vaguely non canonical comics, Marvel can maintain their IP considerations without worrying about bringing such things back into continuity. So we have a reasonable expectation that some things will return, but we can't be sure, and we no longer have the normal legal timetable.