The match became “official” this morning on Talking Smack and it was confirmed that the match will take place inside the Hell in a Cell.
It has not confirmed if there will be an extra stipulation added but that was strongly hinted at during SmackDown when Reigns told Uso that the rematch would be the “highest stakes match in WWE history.”
For what it’s worth, there has been talk in creative about Roman Reigns leading a stable with Jey and Jimmy (when he’s healthy) and others added in the future. We were told that the match at Hell in a Cell would be the next big chapter in the story being told and there are many other players that will be involved in the storyline with Reigns.
Reigns was supposed to be crowned as the Tribal Chief on SmackDown but that never happened because he was interrupted by Jey Uso and Jey refused to acknowledge him as the Tribal Chief, even though Jimmy Uso did acknowledge him last Sunday at Clash of Champions.