We've been told again that Canon will unveil a zoom macro lens in the 200mm range some time in 2014. The lens is currently in prototype form. It's apparently a constant aperture zoom macro, though we can't confirm that it is a 1:1 macro lens. Although, it was mentioned that lens would be 2:1, and could be “locked out” to 1:1 at the long end.
We weren't told how fast the lens would be, but I'd expect f/3.5 or f/4 and it would also have the latest and greatest IS.