According to trusted source for Japan, there will be 3 new Canon lenses to be announced for Photokina 2014. These are one DO Telephoto lens, and two STM lenses, see below:
The EF 400mm f/4 DO IS II USM lens will replace the original version EF 400mm f/4 DO IS USM lens.
The EF 24-105mm f/3.5-5.6 IS STM lens is a standard zoom STM lens as rumored before.
The EF-S 24mm f/2.8 STM lens is the rumored pancake lens designed for Canon APS-C sensor DSLR cameras.
Read More: Canon Rumors