What I expect to see and would be less willing to buy...
EF 35mm f1.4 II L
EF 50mm f1.8 IS
EF 85mm f2.0 IS
EF 135mm f2.0 IS > with the 200mm quietly dropped
EF 300mm f4.0 IS L
EF 400mm f5.6 IS L
45mm & 90mm tilt shifts replaced
Wild cards ?
How about a 600mm or 800mm with built in 1.4x extender or a 50mm f1.0/0.95 or an autofocus lensbaby style lens ?
Dream on ;-)
I think you will see a 100-400mm replacement before a 400mm f5.6. Canon sells about 10x as many of zoom compared to the prime.