Warner Bros used its CinemaCon presentation this evening to unveil the first trailer from Smallfoot, its Warner Animation Group pic where a yeti (voiced by Channing Tatum) makes a wild discovery that was thought to be only a myth: a human. James Corden, Zendaya, Common, LeBron James, Gina Rodriguez, Danny DeVito, Yara Shahidi, Ely Henry and Jimmy Tatro also provide voices for the pic, which hits theaters September 28.