#4 A returning Authors of Pain team
Akam and Rezar, collectively known as The Authors of Pain, have been off WWE television since January of this year when Akam was forced to take time off to undergo surgery for a knee injury.
The team actually made a couple minor TV appearances following Akam's surgery, appearing in the 50-Man Battle Royal at the 2019 Super Showdown PPV, and in a brief appearance on SmackDown Live in June when the two were seen exiting Baron Corbin's dressing room.
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There remains no official word as to when WWE plans to bring AOP back to television. With SmackDown Live gearing up for its debut on FOX Sports on October 4th, it might be a good idea to bring AOP back to TV in time for the SmackDown premiere in order to freshen up the brand when it moves to its new network and home on Friday nights.
AOP and The Revival had numerous, epic battles when the tag teams were in NXT, so it would be fitting for the teams to rekindle their feud on the main roster once Akam and Rezar return to television.