EXCLUSIVE: ARC Entertainment and XLrator Media announced that they have acquired North American rights to the Sundance documentary Knuckle. Ian Palmer’s doc was filmed over 12 years and is about two Irish families who settle a longstanding dispute by periodically engaging in bare-knuckle bouts, focusing on two brothers, James Quinn and Michael McDonagh. The film premiered at this year’s Sundance Film Festival, where its remake rights sparked interest from several parties; HBO landed the project, which is in development, with Scottish novelist Irvine Welsh adapting it into a drama series. The North American deal was negotiated by CAA on behalf of the filmmakers and by Barry Gordon for ARC and XLrator.