Canon EF 15-35mm f/2.8L USM, a L-designated new wide-angle zoom lens rumored for 2016 as a replacement to the current EF 16-35mm f/2.8 II lens.
According to latest Canon rumors, the next version of EF 16-35mm f/2.8L lens will be released sometime in 2016. The focal length could change slightly, something like an EF 15-35mm f/2.8L USM was suggested.
Canon has changed focal lengths a couple of times for this kind of lens. The first in the line was the EF 20-35mm f/2.8L and then the EF 17-35mm f/2.8L and most recently two version of the EF 16-35mm f/2.8L.
Event and indoor photographers would be very happy with wider focal length version, but the question is the price of this lens. At the moment it is unknown whether it will be expensive or not.
Canon EF 16-35mm f/2.8L II USM lens successor coming in 2016
The next L lens from Canon is expected to be another bright prime lens this year. The EF 35mm f/1.4L II USM lens is the one we can see sometime during the third quarter of the year.
The EF 16-35mm f/2.8L II USM lens successor (EF 15-35mm f/2.8L USM) is rumored to be in the works and is on track to be released on the market sometime in 2016 after the next prime EF 35mm f/1.4L II USM released this Summer.