"And there's always the possibility that they might not be someday," Rey quips. "You know, that was probably Fear attempting to gather energy in case he needed to move the city while we were gone. Pretty surprised that he didn't."

After they'd made contact with the Null, Rey is actually more surprised that there was an island city to return to. With how afraid the gods are of the synthetics capable of killing them with the touch of a trigger, she'd think they would want to put as much distance between them and the hivemind that's probably on the way.