Gah Lak Tus may be the lesser ‘Galactus’ between itself and its Earth-616 counterpart, but it's still strong enough to claim its place as Galactus’ most powerful (and useful) Herald of all time.

He has a complicated history with Galactus which has included him actually taking the villain's place in the "Earth X" reality and making the big bad his Herald back on Earth-616 to fend off a ...

Galactus is debuting in the MCU. ... (Earth-616), as it was previously confirmed that this new FF movie will take place in an alternate universe that has a retro-futuristic vibe.

Following the events of the Age of Ultron storyline, Galactus was ripped from the Earth-616 dimension and thrown into the Ultimate Universe of Earth-1610. His doppelganger of this parallel realm ...

In the comics, Galactus arrives in the universe of Earth 616 as the lone survivor of a dying universe. Considering that, it's likely Galactus has more on his mind than simply munching on the Earth.

Whether that’s another world that’s fallen to Galactus’ hunger already, or if it’s even earth ... which saw Marvel-1 show up in orbit of Earth-616.

That's why the most popular theory is they'll get warped into the MCU proper (or 'The Sacred Timeline' of Earth-616) at the end of the movie. They'll have Galactus to deal with before then, though.

Richards and Miles Morales end up traveling to the 616-Marvel Universe to learn how Galactus was ... Thor ends up sacrificing himself to ensure the Earth’s survival, while Galactus eventually ...

One fallout of that will be Galactus getting the signal that Earth houses a great source of power for him to consume. ... (like the main Marvel 616 an Ultimate 16-10 universes).