Wow, what an issue.
T'Challa takes a dangerous translocation route and sees Galactus' history, the end of his universe and him being reborn and consuming a planet.
Galactus tells T'Challa to leave as he did to Blue Marvel and Ms. Marvel and that he cannot be solved.
MAC and Monica clean up the enemy from the first issue and take the device it was using...Galactus birth chamber essentially.
The team stuns Galactus and manages to get him back into the chamber. It requires a huge amount of energy so Blue Marvel throws the Iso-8 in as an energy source to keep him in.
We go back to the first planet that Galactus devoured and he has been transformed...into a giver of life reviving the world.