Trailer:
http://www.youtube.com/watch?v=A0XfJJjAY6c
Super #SmashBros for #WiiU will smash onto the scene on 05/12! Trailer: http://t.co/c4bvLXFZuj pic.twitter.com/70HixxISOg
— Nintendo of Europe (@NintendoEurope) October 7, 2014
----------------------------
UPDATE:
Official dates:
Nov 21th in NA.
Dec 5th in EU.
Dec 6th in JP and AU.