The very same source whom shared the 100% correct ART prime lens rumor roadmap (read here) and leaked to us images too (read here) shared some new info about the future Sigma FE lens line. The bad news is that the launch of the first lens got delayed from end 2017 to very early 2018:
I got some sigma news this morning. The line up should arrive in February next year. The lenses should be the same focal length as the actual line up. 14mm, 24mm, 35mm, 85mm and 135mm. A new 70-200 is arriving in October… but no Sony mount
This is a very solid source so I am 99% certain he is right on this. The good news is that Sigma plans to release al very long list of new primes. I am loving this! The first one will be the 35mm f/1.4 as we “rumored” many months ago.
P.S.: Another Bad news: The new 70-200mm lens will not be available for A-mount :(