Personally I like to think that maybe herc took galactus near the end of thanos initiative when the attention drifted away from the fault and the world he was about to eat was to recharge during battle.

Why?

With all the dead returning and the living going into comas on earth it makes the war of life vs death seem more dire if the dead themselves return to life. If they overlap Thanos Initiative goes from a fairly balanced struggle, to the feel of a war we ALMOST lost... but one that still keeps a heroic feel at the same time. It makes it feel more dire.