League players are preparing to follow their union counterparts into court over brain injury claims.
And a sports lawyer says it could be the "final straw" for professional league, which may not survive if the action is successful.
As first reported by the Herald, 70 former rugby players could have contributed to a possible group class action, including multiple All Blacks, against the game's authorities for negligence.
The rugby league case concerns British league, and it's hard to judge what any ramifications might be for the NRL.
The Guardian reports that up to 10 former league players have approached Rylands Law, which is also representing former union players such as England World Cup winner Steve Thompson who have been diagnosed with brain injuries. The league players, some who are long retired, are understood to be displaying signs of dementia.