Complex sentence: He also voiced Batman in the film "The Lego Movie", making him the first Canadian-born actor to portray Batman in a film and voices the eponymous character in the 2014 Netflix original series BoJack Horseman.
Split into simpler sentences: He also voiced Batman in the film "The Lego Movie", making him the first Canadian-born actor to portray Batman in a motion picture. Arnett voices the eponymous character in the 2014 Netflix original series BoJack Horseman.