IIRC, Einstein suggested that time travel would only be possible (in this universe) if one set off from Earth at a significant fraction of C, so that one would travel relativistically slower and thus be able to return to Earth, not before one had left, but having aged less than those left behind.

So we must all hope that this god person is still speeding away from the Earth, getting ever closer to the Great Chinese Walls which mark the edge of the visible universe, fifteen billion light years away, and that his oxygen will run out long before hesheorit starts to loop back towards us.