Warning: spoilers ahead for The Walking Dead: Dead City episode 1.The Walking Dead: Dead City may be intended as a sequel spinoff to AMC's original The Walking Dead TV series, but two plot points fail to align with the main show's ending. When The Walking Dead season 11 drew to a close in November 2022, the long-awaited conclusion was overshadowed by knowledge that multiple spinoff sequels starring major existing cast members were in development. The Walking Dead: Dead City is first up, reintroducing Lauren Cohan's Maggie and Jeffrey Dean Morgan's Negan several years on from The Walking Dead's ending, "Rest In Peace."

https://screenrant.com/walking-dead-city-ending-retcon-maggie-negan-hilltop/