I have a QF flight from PER to LHR via SIN booked in mid-June 2013.

I have a QF flight from PER to LHR via SIN booked in mid-June 2013. The SIN-LHR flights are codeshare with BA. What's the likelihood that Qantas will contact me next year and reroute my journey via DXB on an Emirates codeshare?

I cannot see the rationale for them to reroute you on the basis of the following:

1) The BA codeshare arrangement with BA will still be in place post 31 March 2013. This was further reiterated in The Australian newspaper today (Sat, 3 Nov), where it was reported that Qantas made assurances to the Australian Jewish community, that said arrangmeents are in place for passengers who fear discrimination, whilst transiting the arab world.

2) PER/DXB & DXB/LHR would be operated on EK metal. It would be illogical to transfer to an EK operated flight for both legs, when the first half would be QF operated with the PER/SIN/LHR itinerary.

3) QF does not operate PER/DXB. It seems improbable that they would reroute you via MEL or SYD to catch QF 9 or 1 respectively, especially when the yields on QF1 and QF9 are much higher i.e. they make more money flying ex MEL/SYD  pax on QF 9/1 compared to flying an ex PER pax on QF9/1.

4) EK operated PER/DXB arrives DXB in the early afternoon (1300h) or early morning (0500h). While QF departs DXB for LRH  around midnight. It would be odd for QF to reroute you and expect you to hang around DXB for 12 - 20 hours.