Leilani Latu will get his first taste of Super League with Challenge Cup holders Warrington Wolves.
Gareth Widdop will miss the start of the Super League season after suffering an injury which could keep him out until after round four.
Catalans Dragons and Warrington Wolves have been hit in the pocket due to ugly scenes in the south of France.
Tries from Adam Milner and Jordan Rankin helped Castleford Tigers to victory on the road in a hard-fought elimination final.
London Broncos' brave bid to retain their Super League status came up short, while Salford Red Devils claimed third place in the table.
Jay Pitts' late try means London Broncos remain in with a chance of beating the drop, while also leaving Hull KR in deep trouble.
Four teams are level on 30 points in Super League after Salford Red Devils comfortably saw off Warrington Wolves on Thursday.
Losers in the Challenge Cup final for two of the last three years, Warrington Wolves turned the tables to beat St Helens and claim glory.
Three tries in a dominant spell saw Wigan Warriors ease past potential play-off opponents Warrington Wolves.
Warrington Wolves offered little resistance against Super League leaders St Helens, who ran out 30-12 winners in Thursday's clash.