They would, but it would likely takes another millennia to do so. Gaea wasn't like other monsters or even like the other gods. Piper had been putting her to sleep before they scattered her, so it was likely she would stay gone for a very, very long time.

If she came back at all.

"It was...," he falls silent for a moment. It feels weird to be praised, but there is no other interpretation for the phrase 'I'm impressed.' It was frustrating to Jason. That he could fight that hard and take down a primordial goddess, but his death had been at the hands of a revived, former Roman emperor. "Thanks."