I may get distracted by purchasing the EF 70-300mm f/4-5.6L IS II along the way...
It seems to me that with the rave reviews the current model gets (and the fact it was introduced as recently as 2010) this may not be one released very soon.
5D mark 3: R14/2.8, 24mm f/2.8 IS, 35mm f/2 IS, 50 1.2L, 100L macro, 85L, 135L, 300mm f/2.8 ii. 8-15L Fisheye, 16-35L, 24-70L II, 70-200L IS II, TAM 150-600mm, 2x600ex-rt
EOS M: 18-55mm, 22mm
SL1: 10-18mm IS, 18-55mm IS