According to the latest tweet from the official Hyrule Warriors Twitter (via a translation from Bing), development on the upcoming Zelda spin-off is now complete.

This at least applies to the Japanese version of the game, which will release very soon on August 14. With this latest news, looks like we can rule out a delayed release. As for the rest of us, Hyrule Warriors will hit the US on September 26, Europe on September 19 and Austrailia on September 20.