According to matt-hughes.com:
Finally, Dana called me yesterday and we had an interesting conversation about the November 20th UFC in Detroit. More news about that down the road.
[UPDATE] – And his opponent is BJ Penn:
BJ Penn and Matt Hughes have agreed to meet at UFC 123 in Michigan. Welterweight bout.
Matt Hughes (45-7)
Win Ricardo Almeida – Technical Submission (Anaconda Choke) UFC 117
Win Renzo Gracie – TKO (Punches) UFC 112
Win Matt Serra – Decision (Unanimous) UFC 98
B.J. “The Prodigy” Penn (15-7-1)
Loss Frankie Edgar – Decision (Unanimous) UFC 118
Loss Frankie Edgar – Decision (Unanimous) UFC 112
Win Diego Sanchez – TKO (Doctor Stoppage) UFC 107