Originally posted by Tar-Antado
Personally, I think both Galactus and Franklin both perish if they didn't cooperate, just like in those other alternate time loops.
I was curious how people on other forums perceived the events in question. Here's part of a review from someone on comicbook-resources.
"Galactus staggers under the assault and Franklin heads for one final push in a conflagration that lights up the entire hemisphere for a moment before it fades, witnessed by the Avengers in Manhattan, the Future Foundation in the Baxter Building (though that panel may be more symbolic with two characters physically out of place), Ronan and Crystal, and sensed by the Light Brigade, and Kristoff mourning Doom. With bated breath, the Fantastic Four see first Galactus standing, and in his palms, Franklin. Victorious."
This is pretty much how I personally saw it.
Someone else on yet another forum suggested that the orb Adult Franklin used to bring back Galactus was actually the pocket universe Young Franklin created earlier on in the series; and that it was used to provide sustenance for the unfed Galactus. Not sure what to make of that one, but it's a pretty cool/interesting take on the story nonetheless.