Dicko, who joins the Millers until January, may start on the bench with boss Steve Evans possibly naming the same starting line up that won at Stevenage last weekend.
Iceland international Kari Arnason returns after his side lost to Croatia in the World Cup play-offs but may not be involved. Boss Evans said to Radio Sheffield: "Kari is back with us and physically he's in tremendous shape but mentally he's very low. It was probably a once in a lifetime opportunity for him to reach a World Cup."
Mark Bradley is rated as 50/50 and David Worrall is back in training but not yet fully fit. Goalkeeper Adam Collin faces his former club.
Carlisle manager Graham Kavanagh has doubts over midfielders Paul Thirwell and Prince Buaben, the latter missing the midweek FA Cup win over Boreham Wood because of illness.
Defender Pascal Chimbonda returned from a groin injury on Tuesday night and should continue and striker Lee Miller was also back in action after suspension and will be hoping to retain his place.
Loan pair Ben Amos and Max Ehmer return to the squad after they were denied permission to play.