wierdly enough I have just been trawling the Skycargo schedules, and as far as I can see all the destinations current are still showing all the way through to next summer.
I believe that the first 777F is due this month so maybe they're going to move the A310s out as the 777F comes in. That would make sense, keeping a 'new' product close to home to get experience.
Mind you, on some sectors I would have thought the jjump from A310F to B777F was a bit big - 40 tonnes to 100 tonnes