>>11726331They hate each other over the ROH-TNA stuff. I think AJ had the Pure title at the time and him and Punk had a pretty hot feud. AJ won at Final Battle, but then TNA withdrew everyone for a couple of months. When they were allowed to come back, AJ feuded with Jimmy Rave and Punk didn't get his win on AJ.
This is more schizo from Punk, because he got over enough that he didn't really need it anyway and his world title run blew it away. But I think that's where the heat starts.