Alistair Overeem just got a unanimous decision over Frank Mir at UFC 169. After the fight Overeem seemed to lay down a challenge to Brock Lesnar. Overeem said, "I heard that Brock Lesnar is about to come to the UFC. Well i'll be here waiting for him."
I am sure this will just add more fuel to the fire to those rumors about Brock Lesnar wanting to return to UFC. There are rumors (not confirmed) that Brock's WWE contract allows him to do one UFC fight. I can't see how Vince McMahon would have signed a deal like that though so who knows.