We noted last week that Roman Reigns teased a possible appearance by The Rock at Sunday’s WWE SummerSlam event. According to Dave Meltzer, there were rumblings of The Rock making an appearance even before Reigns mentioned it during a radio interview.
While this doesn’t necessary mean that The Rock will be there, but it’s likely that it has been discussed by WWE officials. If the part-time WWE Superstar was to make an appearance, very few people in the organization would know about it.
Source: Wrestling Observer