I only follow the US market, so I'm afraid I don't know much about the Zoe.
I agree with Yggdrasill that the 2017 i3 BEV will very likely have about 120 EPA miles - that's all that really fits for now unless you go with some ridiculously priced cells, and people that don't think that's enough can get a REX. There have been hints of a (I suspect very small) makeover too, but BMW tries not to say too much to avoid Osborning their current sales. The 2017 i3 should (?) be available in the US around July. I hope they will keep selling the current battery at a significantly lower price, but that's just speculation.
Nissan, like BMW, is largely trying to stay quiet because they want to keep selling what they have. But at investor meetings and such they have answered some questions. Initially they said the car would have around 186 miles of range (300km, and enough to get a 4th credit for "200 miles" on CARB's more-generous-than-EPA scale), but they may have revised that a bit internally after the Bolt and T3 announcements if it's not too late to change it. They have also said that they want to make it "look a lot more mainstream" so they can sell more. They've been showing off their IDS show car for a while; they've not explicitly said the 2nd-gen LEAF will be like that, but it does have a big battery, high levels of drivers assist, and it looks a whole lot nicer than the current LEAF. The production car's looks will probably be toned down and I doubt THAT much driving tech will be in it, but I'd guess it's intended as a strong hint as to what we will get. I would bet that Nissan WANTS to release the 2nd-gen LEAF just before the Bolt arrives (December, in ZEV states?), but from what very little I've heard I don't think that will happen. They may just settle for beating the Tesla 3 to market; it might be a 2018 model (though I imagine it will be available in 2017).
(GM, unlike BMW and Nissan, has been making a lot of fanfare about future models because they already had enough credits from the Spark and 1st-gen Volt that they didn't need to sell more of those very low-margin cars; they thought the brand image from being first to talk about next-gen cars would be a bigger boost for them).
