[user104658]

I’m looking forward to it, we have encountered them already in various ways - Jadis/Anne was selling people to the commonwealth for resources - she was planning to trade Gabriel, Rick, and at one point Negan… then did eventually trade Rick in exchange for her own place in the commonwealth setting up the Rick Grimes movies. It’s implied that they’ve been watching him for a while - every time Rick has seen a helicopter through the series it was them, right back to S1…

Also they’ve encountered them in Fear The Walking Dead - a main character met, helped and eventually left with a Commonwealth helicopter pilot, who also provided a group with a tonne of antibiotics to beat an illness… though it was implied that it was “off the books” and that the commonwealth bosses wouldn’t be happy if they found out.

The group that Eugene’s expedition has run into will most likely be commonwealth-linked, too.