Something in return.
In many of the potential futures seen through the Needle, Nathaniel Carter manages to gain enough influence over the Awakened to form a separate faction, which leads to a bloody war with mostly dead ends as the conclusion. The same happens whether the humans and Nephilim remain homogeneous or unite under one flag.
The Awakened were as much of a curse as they were a blessing. Previously, Sam didn't have to worry too much about bringing the Nephilim into his world, but after everything he learned through his short visit to their world, the consequences became a lot more complicated.
"Merging societies, huh…" Thor muttered, staring at her reflection in the clear surface of her drink. She seemed to ponder over his suggestion for a while, and though her expression hid it well, Sam could tell that she didn't like it very much. "I doubt it's possible."
Sam raised an eyebrow.
"I'm aware it would be extremely difficult, but…"