Problem with Fantastic Four ending

So in the end battle they teleported Galactus to a far corner of the universe without his ship, believing to have spared themselves possibly millions of years, however, the problem here is that Galactus can teleport anywhere he wants instantly, he could immediately return to Earth and Taa II no problem.

Normally he doesn't teleport because it takes a lot of Cosmic energy to do and he would rather travel slowly in Taa II and preserve it, but in this case it makes perfect sense he would just instantly teleport back.