I can see Wilson getting a chance over the coming months. He's perhaps the most likely to break into the first 11 as he's playing regular first team football for a decent Premiership team and is able to play in a number of positions many of which we're struggling for decent cover in (left back, central defence, central midfield).
Pilkington might get a look in if he continues to impress for Norwich though I'm not sure he or Norwich will be able to maintain their good form throughout the remainder of the season.
Meyler also could come back into the fold but only if he can start getting regular game time at Sunderland again and steer clear of injury both big asks at present.
I can't see Coleman getting into the starting 11 at right back as I don't think Trap trusts him defensively and he plays in a more attacking role for his club. He could, however, provide back up for the right midfield position after McGeady, Duff and Hunt.
McCarthy has done nothing this season thus far for Wigan and would need a major improvement in form to cement a place in the squad.
If Ciaran Clark can get regular football for Villa in either central midfield or central defence he might also be given a chance.