#2 RETRIBUTION makes a run-in during the WWE Championship match
This might be a bit of a stretch, but the only way this happens is if WWE is really high on RETRIBUTION and are looking at it as their next big faction. And we have some hints to believe that this might be true as WWE let them "interrupt" the opening segment and promo of WWE Champion Drew McIntyre this week on RAW.
In all likeliness, the main event of WWE SummerSlam will be Drew McIntyre vs Randy Orton for the WWE Championship. There has been a lot of debate among the fans as to who should come out victorious at SummerSlam and have the WWE title around their waists? But what if RETRIBUTION decides to invade the main event of WWE SummerSlam, leading to a no-contest?
Now, there are chances of that happening as WWE will be holding a second PPV just a week after SummerSlam, WWE Payback. This PPV could then be used for a rematch between McIntyre and Orton, with proper security in place. Thus, we do get a proper match between the two, and RETRIBUTION gets to make a huge impact at WWE SummerSlam. But as I said, it all depends on whether WWE is very high on the faction or not.