it wont be carlito, almost deffinately. it also wont be edge or orton. they couldnt have 3 main event guys out of the title picture. If it was at all possible, it would be the hardy boyz but it wont be. if a third member does join, that will have to be at unforgiven in the 3 on 2 match. therefore its not that likely that it will be someone involved in another storyline/who already has a match. if a third member joins it will be someone with no other storyline on the ppv or someone new to the show. I think possibly more likely that someone does come and help them but that person wont join dx, like maybe cena to get him over with the crowd, or maybe sabu would interfere because he hates the big show. something like that. the only person coming to wwe whos likely to join is ron killings but i wouldnt consider that a great ending to a big match if ron killings interfered. could be steph though?