I agree. I'm far too jaded at this point to believe the sales pitch. I would be happy for this story to wrap up and for us to get Thor back, but I'm skeptical. As long as Aaron is on the title, I don't think things will truly be set straight.
Well I did have a theory that the Ultimate THOR hammer would go to Jane and THOR would reclaim Mjolnir, but Mangog has literally shattered that idea.
For Jane to receive a miracle cure at this point seems unlikely unless the cosmic cube, time gem or reality gem are used to restore her.
However even if she does perish that does not mean that Mjolnir will return to THOR.