
Lanterns will have two timelines, one of which is set 10 years in the past – which means the TV show will be the first story on the new DCU timeline.
The 2016 timeline looks to be the main story. It involves a shooting in Nebraska, which Hal Jordan is investigating with new recruit John Stewart. This is the plot line teased in the show's trailers and promotional material, but it looks like the action will also cut to 10 years later "to something else" happening in 2026.