Complex sentence: The film is a spin-off installment of "The Lego Movie" (2014) that focuses on the DC Comics character Batman, and is the third feature film produced by Warner Animation Group, as well as the second feature film based on Lego properties.
Split into simpler sentences: The film is a spin-off installment of "The Lego Movie" (2014) that focuses on the DC Comics character Batman. It was the third feature film produced by Warner Animation Group, as well as the second feature film based on Lego properties.