The latest version
"By signing up to play EA's titles," the policy reads, "you agree that limited user account information can be transferred to EA. Information transferred to EA includes your Mii information, email address, Nintendo Network ID, friend list, country, language and date of birth."
Not only does this confirm that Origin will be an integral part of playing EA games on Wii U, presumably in a similar fashion to its integration on Xbox 360 and PlayStation 3, but also that Nintendo's friend codes of yore are being supplemented/replaced by something called a Nintendo Network ID. We've reached out to Nintendo for comment and will update as soon as we know more.