Johnson has also been linked with a loan move for Wolves striker Stefan Maierhofer but whether something happens in time remains to be seen.
That means Danny Haynes - who replaced Iwelumo as a 46th-minute substitute on Saturday - could come into the starting XI while John Akinde is also staking a claim.
Defender Liam Fontaine was brought off as a precaution after he picked up a knock, although he should continue despite Jamie McAllister's return to fitness.
Evander Sno, Jamie McCombe and Marvin Elliot remain long-term absentees.
Source: Team Talk
Source: Team Talk