Trotter, who was in the Iron squad which beat Millwall in the 2009 League One play-off final, came off with a hamstring problem during last weekend's goalless draw at Preston.
Jimmy Abdou came on in Trotter's place and would be his likely deputy to start in the centre.
Striker Josh McQuoid should be added to the squad for the first time since his switch from Bournemouth late last week.
Fellow frontman Kevin Lisbie (knee) and wingers Chris Hackett (hip) and Danny Schofield (thigh) will be checked over.
Fit-again full-back Andy Frampton has extended his loan spell with Swindon by another month.
Source: PA
Source: PA