Along my lines of expectation.
EF 16-35/4 IS ... Yes, if IQ is excellent from f/4 - including sharp corners. Price will be much higher than 17-40 but with an upper limit ... 16-35/2.8 II. :-)
no competitor to nik 14-24/2.8 though. If at all, that univorn will only be released together with the mythical canon hi-res body ... "D800E-killer" ... Until that day, serious landscape requires nikon. :-)
EF-S 10-18/4.5-5.6 IS STM ... Shorter and even slower than i expected. No replacement to EF-S 10-22. Really sounds like the WA end of a "plastic fantastic STM trinity". If it's very compact & light and IQ matches EF-M 11-22, priced around 300 i expect it to sell very well. Maybe also as triple zoom kit with sl-1/100d and 700D ... 10-18/18-55/55-250 ... all with silent stm for video. Rather nice, light and inexpensive "travel kit" ... and Nikon currently has nothing to compete with such a kit
Just got the 55-250 stm to go with my 7D when i am not willing to carry 70-200 2.8 II. IQ of the STM is no match of course ... but definitely ok. AF is quite slow though (for stills) in comparison.