My dealership thinks Yamaha would be busy focusing on the new Tenere 700 launch in 2017 and any changes to the 1200 Super Ten can be expected only in 2018. Just speculation again...!
I'm going to guess skip a year or two and try to sell all new leftovers. There's still a 2013 on the floor up the road. I've had a couple of dealers tell me that when they finally get rid of what they've got they don't want any more.