Yes, if he's gonna reset the universe/multiverse. But all that would do is BFR Nekron from the universe and back to his own dimension.
Nekron's unique status as a Death/Oblivion Abstract shouldn't be underestimated. Keep in mind that when Quasar was nullified, he did indeed go to Oblivion's realm (where all nullified beings go) but Quasar was still conscious and his nullified form was "killed" (I kid you not) by his personal Death Avatar. Not only did his nullified form die, his "spirit" went to it's destined place in the afterlife, bypassing Oblivion and his realm completely. Nekron's odd, ODD combination of abstractions would save him, IMHO.
I don't think the Nullifier would do anything to Nekron except somehow BFR him back into his own realm. Which I guess would count as a win for the Nullifier and Galactus.
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..even the outer hells are indifferent matters for they bow only to potent and archaic Nodens.
The Nullifier removed a multiversal abstract named Abraxas.
In Paradise X, it was shown to remove Death. There's also a What If where a group of here's entered what seemed like unspace (totally white) and the only thing remaining was the Ultimate Nullifier. They were going to use the UN to nullified this empty, theoretically bringing back the universe, but residual spirit of Eternity asked them not to. These two events are not canon but gives you an idea of what writers think abut the UN. Still, it was capable of removing a multiversal abstract from ever existing and fixed the multiverse.
Wrong.
Did you read the text and the issue? He didn't escape Nullification and Death because of the Star Brand. He STILL wound up going to the afterlife, the place where all former protector of the universe's go when they die, the White Room. He was able to escape the WHITE ROOM because of the Star Brand.
This is further confirmed in an alternate reality, the reality of the Guardians of the Galaxy, where Starhawk was sent there when he died, because he briefly had possession of the Quantum Bands. He was able to escape, and it was mentioned on panel, because of the power of the Hawk God.
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..even the outer hells are indifferent matters for they bow only to potent and archaic Nodens.
It was too late to edit my post but here are the reference scans :
Involving Quasar -
a) His spirit body vaporized in the White Room (please log in to view the image)
b) The Star Brand reforms his body (please log in to view the image)
c) Confirmation that it was the Star Brand that reformed his body after Blue Marvel destroyed it, but it wasn't responsible for him dying after Nullification and being sent to the White Room. That's what happens to the spirits of ALL former protectors of the universe as stated by Eon himself. It's the afterlife. (please log in to view the image)
But if this isn't enough proof, here is yet more evidence from the Guardians of the Galaxy :
a) Starhawk dies (please log in to view the image)
b) His spirit is sent to the White Room (please log in to view the image)
c) He is able to break out of imprisonment because he has power that isn't tied to the Quantum Bands and Eon, and on top of that, he's able to free Quasar too (please log in to view the image)
d) Confirmation that 1) he was able to get up and move about because he had power not tied to the Q-bands, 2) that because he wore the Q-bands, even briefly, this is where his spirit went after he died, and 3) because he has power not tied to Eon and the Q-bands, he's able to escape the White Room (please log in to view the image)
Recapping, the Starbrand didn't stop Quasar from being nullified, dying while being nullified and being sent to the White Room (this is what happens to all protectors of the universe and is their version of the afterlife, this was all Eon's doing). The Starbrand DID save Quasar when Blue Marvel destroyed his spirit body in the White Room though, it reformed him fully alive and allowed him to escape (but only after Eon finished 'examining' Quasar).
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..even the outer hells are indifferent matters for they bow only to potent and archaic Nodens.