I wondered if anyone can shed some light on whether an EF 100-400mm replacement is due anytime soon? I have made the decision to purcahse this as my first "L" lens, mainly for outdoor sports (equestrian, motorsports) and wildlife. What has me concerned is the fact that this lens has been out for some time now. This can be looked at in a few ways I guess (eg It cannot be improved any further, They are still selling well so no need to invest R&D into a new model, etc). The 70-200mm f/2.8 has gone through a few upgrades since its relese and I'd be a bit disappointed if I forked out the cash with a refreshed/upgraded model on the horizon.
Any feedback welcome.