Despite the announcement about his match being pulled from WWE SummerSlam, it looks like Matt Riddle will be a part of tonight's show.
PWInsider reports that Riddle is currently backstage and he will be appearing on the show at least to give an interview or a promo about being attacked by Rollins last Monday night on Raw.
So, while he may not be wrestling on the show, it looks like there will be some sort of angle to further the storyline. The plan is for Riddle vs. Rollins to happen at the Clash at the Castle show in Cardiff, Wales. At this point, there's no word on if there are plans for Rollins to wrestle someone else on tonight's show.