Warren misses the showdown match through suspension and will have to watch proceedings from the sidelines.
John Hughes says there is one other player – who he chose not to name – facing a fitness test on the morning of the match.
Long-term absentee Richie Foran remains out due to a knee injury.
Meanwhile, Falkirk manager Peter Houston has picked his side for the match but has not yet revealed his starting XI.
Fit-again striker Rory Loy has been told he will be in the squad but may have to start on the bench because he has not played since hurting an ankle on March 6.
Falkirk are definitely without cup-tied duo Mark Kerr and John Baird.