Originally Posted by Smiles and Cries
this is news
No, it isn't. As Nintendo themselves noted earlier today, the system update required to deal with DLC will be added in December. Thus, the Wii U, as of this time, does not support DLC.
I can't speculate on whether or not they are certifying DLC behind the scenes--so if they don't start certifying DLC until the system update comes, that'll be another month or more before devs are actually releasing DLC.