After Seth watched the drill-shaped Beyonder machine leave the Outerverse, he bid the two Ancient entities farewell and piloted his arkship away from the edge of the universe.
Although he never got to see the true forms of these ancient ones, take a close look at them, and had never done so since he knew them he was satisfied. Seth didn't want to know them too much.
There were some explicit implications of having too much knowledge about certain entities that were too powerful for reality to configure.
Seth was satisfied like this, he didn't want to know them more than what he already knew.
As long as there was an agreement between him and them and knowing that they were eternally chained to this place, Seth was okay and that was enough for him.
If someone was to trace back and find out when all this started, they would be very confused.
After all, this should be the first time at least that Seth was officially stepping out of the Original Heaven since he became an Immortal.
