NRL players and staff will be forced to endure prison-like treatment and complete a 14-day solitary confinement program as part of strict biosecurity measures in the innovation committee's "bubble" proposal.

Expert advice to enforce mandatory lockdown protocols that prohibit players and coaching staff from leaving hotel rooms threatens to end the season before it even returns, with players set to decide whether they are willing to abide by the non-negotiable safety measures.

Players outside the Pullman hotel at Olympic Park, one of the venues expected to hold players in solitary confinement for 14 days. Credit:AAP

Sources close to discussions have also told The Sydney Morning Herald: