Showtime has released the first trailer and poster for its new limited series The Good Lord Bird, which will premiere on Sunday, August 9 at 10 p.m. The seven-episode series is executive produced by Ethan Hawke, who stars as controversial abolitionist John Brown. The Good Lord Bird is told from the point of view of Onion (newcomer Joshua Caleb Johnson), a fictional enslaved boy who becomes a member of Brown’s motley family of abolitionist soldiers during Bleeding Kansas -- a time when the state was a battleground between pro- and anti-slavery forces -- and eventually finds himself participating …