#4 A double turn
Rumors have begun running rampant that WWE may be planning a double turn at Hell in a Cell. The on-going feud between former best friends Charlotte Flair and Becky Lynch has somewhat been trouble for WWE because of the the heel/face dynamic.
At SummerSlam, Charlotte became the SmackDown Women's Champion by pinning Becky, following which Becky viciously attacked Charlotte, leading to a huge pop from the WWE Universe.
Actually, WWE were trying to portray Becky as a heel, but the fans have been receiving her as more of an anti-hero than an outright heel, while Charlotte is perceived as more of a female Roman Reigns by consistently reaching the main event picture and surpassing other women on the roster.
Charlotte is a natural heel, so WWE should switch both the women's characters at Hell in a Cell. Charlotte could use a weapon such as a steel chair on Becky to disqualify herself, which would bring the heat to Charlotte and sympathy for Becky. The double turn would really surprise the crowd.