No because Eternity and/or Infinity would step in, then Oblivion would probably jump in and they'd be right back where they started from : eternal stalemate.
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..even the outer hells are indifferent matters for they bow only to potent and archaic Nodens.
Yeah but if Eternity decide to step in why wait until Walker had already kill billions? Its a weird story that or Walker is a death god of his own Galaxy, so he kills everybody in his galaxy why didn't Death stop him or Eternity stop him? Why did Death feel she had to hide from Walker, She is the universal death god right? why would she worry about a Death God in one Galaxy?
One galaxy is nothing in the greater scheme of things. There are tens of thousands of galaxies (if not more) in the universe. So Eternity wouldn't interfere for something so trivial.
Regarding Death fleeing hiding from him, this is a forum misunderstanding. She wasn't fleeing out of fear, she was fleeing because she didn't want to hurt him. But he pushed too far when he tortured innocents and she finally put her foot down, destroying him utterly.
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..even the outer hells are indifferent matters for they bow only to potent and archaic Nodens.