Newcastle hooker Phoenix Crossland has received a four-game suspension for dangerous contact following his hip-drop tackle on Nathan Cleary in the preliminary final.
Harrison Graham is the leading option to replace him, having played hooker in Round 26 when Crossland was sidelined with a knee injury.
Diesel Hagan, Kyle McCarthy or Elijah Salesa Leaumoana is expected to join the Knights' six-man bench.
The Roosters have kept the squad that beat the Dolphins to reach their first grand final since 2019.
Utility Connor Watson is named on the bench despite failing a head injury assessment last Friday; he will see an independent neurologist on Thursday seeking clearance.
Newcastle finished seventh and rose from last year's wooden spoon to reach its first decider since 2001, chasing a third premiership.
The Roosters are pursuing a 16th title, while the Knights aim to complete one of the season's most striking turnarounds.
The last club to climb from last place to a grand final the following year was the Roosters, who reached the 2010 decider after a poor 2009 season, then lost to the Dragons.
After 27 rounds and three weeks of finals, the teams meet Sunday at Accor Stadium to decide the 2026 NRL champions.