Did I say it would? I merely pointed out that if Galactus (in the relevant comic by Nova's account) hadn't been feeding prior to the hunting for Magus began, and yet was capable of seperating Eternity and Infinity bounded together by five cosmic cubes (one merged I believe four universe all in all), then try to amplify that up to full power, it relates very well with what Doom said actually, that even though he had a Cosmic Cube (and by Reeds account that was enough to make him master of the universe) he still went for Galactus power, in comparison to which he described the Cosmic Cube as but a Fraction. This is merely to give some perspective into that when People say high end feat it doesn't equal the Galactus from Black Celestial Act. However we still have Spectre (the way I understand it) who broke the power of the IG in the Marvel/DC crossover, which I believe both companies regard as canon.