Hull have completed the signing of Tonga international winger Mahe Fonua from Melbourne Storm on a three-year deal.
Jordan Rankin and Setaimata Sa will leave Hull at the end of the season.
Hull FC winger Steve Michaels has signed a new one-year deal to keep him at the KC Stadium for the 2016 season.
Hull prop Liam Watts is facing a lengthy suspension after being charged with biting an opponent in the Hull derby.
Wigan Warriors will kick off the inaugural Super 8s at home to Huddersfield Giants on Thursday, August 6, live on Sky Sports.
Now the regular season has finished, the 24 Super League and Championship clubs have split into three Super 8 groups.
The Super 8s confirmed, Westwood avoids a red, and coaches on referees. We look at the main rugby league talking points.
Wigan threw down the Super 8s gauntlet with a superb 48-12 win over Hull FC on Thursday night.
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