WWE’s original plan for Sting at SummerSlam was for him to team up with Roman Reigns and Dean Ambrose in a six-man tag team match against the Wyatt Family (Bray Wyatt, Luke Harper and Erick Rowan).
However, with Rowan being out with an injury, WWE is looking for someone to replace Rowan in the match. This is all confirmed by Dave Meltzer on last night’s episode of the Wrestling Observer Radio show.
Meltzer would go on to speculate that WWE may introduce a new Wyatt Family member, but that is NOT confirmed by any means.