Sonny Bill Williams will reveal his next contract signing on Wednesday when it’s expected he’ll announce he’s turned down an NRL return to recommit to New Zealand Rugby through to the 2019 World Cup.

Williams will front a media conference in Auckland following weekend reports in New Zealand saying the cross-code star wants to chase a third World Cup campaign with the All Blacks.

The 30-year-old is a good chance to leave the Chiefs to join under-performing Super Rugby rivals the Blues, where he’d come under the tutelage of coach and former All Blacks centre Tana Umaga.

Williams is currently competing for a spot in the 12-man All Blacks Sevens squad for the Rio Olympics.

NZ Rugby chief executive Steve Tew wouldn’t be drawn into speculation on Williams’ future at the naming of the All Blacks squad on Sunday.

“Everyone knows we’re keen to keep Sonny Bill and we’re working our way through that,” he told Fairfax Media.

Williams was part of the Rugby World Cup-winning teams in 2011 and 2015 after making the shift to rugby from NRL outfit Canterbury mid-season in 2008.

He returned to the NRL for two seasons with the Sydney Roosters in 2013, picking up a premiership title in the process before returning to the 15-man code in September 2014.

It was rumoured Williams would return to the cashed-up Sydney Roosters after the Rio Olympics.