Rumour mill says it's Royce Gracie he wants to rematch. It was a bad match-up for Royce eleven years ago.
I haven't liked Hughes since the 2nd season of The Ultimate Fighter. Guy just seems like a bully and a jerk. If he calls out Royce it confirms that feeling. No reason to pick a fight with a guy he already beat soundly.
Royce has expressed interest in a rematch. Now they just need to convince 1-million or so fans to watch it. Good luck.