It all works out nicely, until Galactus decides that it is time to eat up Apokalips.
He tried that one time and found it was too dead to be worth eating or something and just left.
Yup. In the "The Hunger"
crossover by John Byrne. IIRC, Byrne did a few Marvel/DC crossover books, including a WW2 era Batman and Captain America team-up.
I have recently come across all of my Marvel/DC team-up books and if I had a scanner I would be posting images. Maybe I'll try to just take pics of the pages with my camera phone...