How Long to Beat

Main story: 10–12 hours. 100% completion: ~50 hours.

PlaystyleTime
Main story 10–12 hours
Main + extras 20–25 hours
100% completion 45–55 hours

Story length is similar to LEGO Batman 3 (10-12 hours main). 100% completion is significantly longer than the trilogy because of the open-world Gotham and the 121-puzzle Riddler / Cluemaster system.