Highly-rated open-side flanker Lewis suffered a similar injury in May and is six weeks into his own rehabilitation programme with the region expecting him to be fit again by November.
He has already declared he would like to be involved with the team again and will hope the Rugby Football League will give him the chance to pitch for the job.
United boss Ferguson did not want Queiroz to leave in the first place and he, along with the rest of the club, will be glad to see him gracing their corridors again.
Mr Kahn has been bedridden after a fall at a campaign rally, but a doctor treating him told the BBC that the PTI leader would be walking again within two weeks, with the help of a temporary brace.