#3 Braun Strowman sets his sights on AJ Styles

Despite a valiant effort, Braun Strowman came up short in his Universal title match against Seth Rollins, having already lost the WWE RAW Tag-Team titles earlier on in the night. Strowman needs to bounce back after Clash of Champions and one great way to do it would be to have Braun attack AJ Styles and The OC and then state his intentions to go after the WWE Intercontinental Championship.
This could lead to Strowman versus Styles for the title at WWE Hell In A Cell which is definitely a match fans will be interested in.
#2 The Fiend attacks Seth Rollins backstage

The Fiend showed up at the end of WWE Clash of Champions to attack WWE Universal Champion Seth Rollins, clearly indicating that he is all set to get a title shot at WWE Hell In A Cell next month. This allows The Fiend to double down on his chance to play mind games and to send another physical message to the WWE Universal Champion.
One way to do this would be to have Rollins backstage giving an interview and then to have the lights go off. Wyatt could then appear and take out Rollins, leaving him in a crumpled heap.