W WE SummerSlam just got a whole lot bigger ... 'cause Paul Heyman has accepted Roman Reigns ' challenge for a tag team match at next week's big event -- saying the only thing left to decide is the date!

Roman Reigns would like to have a word with his former "Wiseman," Paul Heyman, who now refers to himself as "The Oracle." Heyman turned on "The OTC" at the conclusion of "WrestleMania 41" night one. Reigns made his return to WWE TV during the July 14 episode of "Raw,

In the headlining segment of WWE Raw, Paul Heyman, Bron Breakker, and Roman Reigns trade verbal jabs just days before SummerSlam.