Well, Helena can't come with us into Genesis- So I assume no Homo Deus can- but wait... We are Homo Deus, aren't we? We literally killed the king of death himself. But another thing, this apparently doesn't happen right after extinction, but it "Lines up pretty well". But wait AGAIN- Maybe Helena CAN come with us but doesn't want to, as she states "Others need me" but then YET AGAIN she states that "your path leads beyond my reach."... So many ideas, so little time...