The CRM is 110,000 strong with multiple cities (Cascadia, Omaha's remnants). Season 1 killed the top generals, but the middle command remains. Season 2 could explore a power vacuum, leading to a civil war that threatens to spill out into the surviving independent communities. Rick would be forced to return to stop a genocide campaign.
Whether it’s a second season or a lead role in a new crossover, one thing is certain: Rick and Michonne are back in the fold, and their story in the apocalypse is far from over. season 2 of the ones who live