As has been very widely reported for some time now, there has been a vast amount of speculation that AJ Styles and Bullet Club members Doc Gallows and Karl Anderson would soon be joining WWE, potentially debuting at this Sunday's Royal Rumble event.
In regards to Styles, as previously reported, he is now being advertised to appear at a Ring of Honor Wrestling event in Georgia the night before the Royal Rumble where the company will give Styles a "send-off" from the organization. Furthermore, during an appearance at an independent event in the United Kingdom this past weekend, Styles teased that he would be a participant in the Royal Rumble Match, telling the crowd that he would be ready if there was a spot open in the match. Reports are that there has been communication between Styles and WWE; however, it remains unknown at this time whether or not Styles has undergone all of the necessary medical testing that is required to sign with the company.
In regards to both Gallows and Anderson, reports are that it is unlikely that both of these men will appear together at the Royal Rumble. In the case of Anderson, he is reported to still be under contract with New Japan Pro Wrestling, which would make him unable to undergo WWE's medical testing. Furthermore, both he and Gallows are advertised with both NJPW and ROH through February, which means that the earliest Anderson could appear for WWE would be early March.
In the case of Gallows, PWInsider.com reports that he was never signed to a contract with NJPW and that he was actually in Pittsburgh, Pennsylvania last week to undergo medical testing with WWE "according to a well-placed WWE source." If and when Gallows passes this testing, he would be free to re-sign with WWE (this would be Gallows' second stint with the organization), which would make him free and clear to appear at the Royal Rumble if he wishes to do so.
Of course, WrestlingNewsSource.com will continue to keep you updated regarding this story as more information is made available.