Then again, no NCIS series had ever been cancelled before NCIS: NOLA, so there’s no precedent for an NCIS show getting a happy or unhappy ending.
The original NCIS is still going (for now) in Season 18, while NCIS: Los Angeles has managed to hold on to almost the exact same core cast for all 12 seasons so far.
For now, NOLA is the only one to get the axe, and CBS is reportedly already developing another show for the franchise.
CBS hasn’t announced a decision for either show beyond the current season.