Nuvendil on 10 November 2015
I expect (for the Wii U) emphasis on holiday launches, a significant announcement (Twilight Princess HD), some indies (concrete FAST Racing Neo release), and more details on early 2016 games (Star Fox maybe, Pokken, Genei Ibun Roku #FE, Lost Reavers).
I expect we'll get some minor stuff about Zelda but I expect the blowout to be at The Game Awards, since it's a big event with a guaranteed large viewership.
