AlmightyKfish
This Is No Longer A City.
I mean, Owen said he'd be ineffectual but technically he's been in that fractured state in every appearance he's ever had, as the killing of his alternate selves started straight after the accident that 'activated' him.
Which does explain his fluctuating showings/mental state over the years, but even throughout he's still been able to warp reality.
But all that aside, it's irrelevant as the whole epilogue to Secret Wars mentioned how they were 'fixing' MM. And he's clearly able to warp reality etc when he talks to Galactus.