There is some talk backstage of holding off Roman Reigns vs. Triple H until the Night of Champions pay-per-view. The reason being is that it would help push WWE Network renewals that would ultimately expire at the end of August.
If WWE goes this route, they would have Reigns vs. Kane at WWE Battleground, followed by Reigns vs. Randy Orton at SummerSlam.
There is also talk of a possible swerve at Money in the Bank, which would see Randy Orton win the WWE World Heavyweight Championship, leading to him vs. John Cena vs. Roman Reigns at WWE Battleground.