How old is Darren Bond? I thought he was one of the older SG2 referees, although I might be wrong.
Josh Smith or Tim Robinson seem quite likely. I'd imagine there will be at least one promotion to SG1.
As for next season, I'd like England, A Madley, Jones and Gillett to be pushed a bit further in terms of their appointments. I'm sure Brooks, Salsbury and Harrington will all start to receive more regular appointments - I sense it was always planned that they'd only do a very small number this season.