There was no date specified over a potential Super League return following a meeting between clubs and RFL officials.
Warrington Wolves won 38-4 at Hull FC on Thursday it what turned out to be Lee Radford's final game in charge of the hosts.
Ben Murdoch-Masila's stay in Super League will come to an end after the 2020 season as he returns to the NRL with New Zealand Warriors.
Hull FC held off an incredible comeback from Wakefield Trinity, but Marc Sneyd only secured the win in golden-point extra time.
Warrington Wolves were shut out at Headingley as Leeds Rhinos scored six tries without reply to make a statement.
Castleford Tigers beat Wakefield Trinity for a 14th straight time, as Huddersfield Giants and Warrington Wolves also claimed wins.
St Helens are top of the Super League table with three games played after they beat Hull FC 32-18, while Wakefield Trinity beat Warrington.
Warrington Wolves have stood down Anthony Gelling as they probe his "conduct away from the club".
St Helens failed to score as Warrington claimed a big Super League scalp, thanks to tries from Daryl Clark, Tom Lineham and Josh Charnley.
Warrington Wolves were reduced to 12 men early on against Wigan Warriors, who ultimately saw out a cagey win to start their season in style.