Did we ever find out who this guy is? We've seen him at SDCC, Oz and now the Emmys. My hope is he's Luke's replacement; more likely: a special consultant on 'fixing absolute clusterfucks,' which suggests they knew it was an absolute clusterfuck circa SDCC - while most had called it by the Selena Gomez concert (the rest following suit somewhere around T-shirt Gate).
http://4-ch.net/img/src/1474253767543.png
http://4-ch.net/img/src/1474253800614.png
Low likelihood: TH's real date to the Emmys.