The EF 24-70mm f/4L IS USM is designed as a relatively compact image-stabilized standard zoom for full frame SLRs, and will be offered as a kit with the EOS 6D. It includes a Macro setting offering an impressive 0.7x magnification, backed up by Canon’s Hybrid IS that promises increased effectiveness at close distances. It’s also weather-sealed, and will be available from mid-December.
Source from Canon Rumors, a new Canon lens EF 24-70mm f/4L IS is coming, there is no news on the announcement date for this lens, but source told this lens will coming soon. Maybe a kit for the new Canon EOS 6D.