How Galactus Could Join the MCU With the Fantastic Four

With all the flack that came from the Eternals film, it did provide us with something quite unnerving. The sheer size of the Celestials was enough to take the audience's breath away. As Arishem peered down at our planet, it became clear that not only were there aliens, but there were enormous, old, and frighteningly destructive beings in the universe that we could not hope to conquer on our own.