Watch Will Ferrell vs. Mark Wahlberg in Hilarious 'Daddy's Home' Trailer

Will Ferrell and Mark Wahlberg set out to destroy each other in the hopes of winning the illustrious title of "Greatest Dad" in the wild new trailer for, Daddy's Home, which premiered on Ellen. The film reunites the two Other Guys, but this time they're pitted against each other as Brad, a mild-mannered step-dad...