#3 Gallows & Anderson
When Gallows and Anderson made their shocking debuts on RAW, it seemed as if they may have finally arrived at the top. It looked as if they would be seen as top guys and they were featured heavily in the main event scene as they reformed 'The Club' alongside AJ Styles.
The clashes between them and the Usos were great but then, as sometimes happens in the WWE, AJ Styles was moved to Smackdown and this narrative - and all their momentum - was stopped dead in its tracks.
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Although they did go on to win the Raw Tag Team titles, their run was pretty forgettable and once they dropped the titles to the Hardy Boyz at WrestleMania they were directionless.
The Club were a major force in NJPW and Dave Meltzer reports their WWE contract is due up in the early parts of this year. There is no reason why they can't return to NJPW and pick up where they left off and then consider a return when the WWE starts to treat its tag division as more of a priority.