The influential midfielder has been sidelined since early March after suffering a knee ligament injury against Swansea.
McKenna has resumed full training but remains some way off match fitness and Reds boss Billy Davies is weighing up whether to take a gamble on the former Preston skipper.
Davies will make changes after continuing to give his fringe players match time at Scunthorpe on the final day of the regular season.
Lee Camp will replace Paul Smith in goal while Chris Gunter should return at full-back and Dexter Blackstock is expected to start in attack. Chris Cohen, Robert Earnshaw and Radoslaw Majewski are also likely to be recalled.