Koei Tecmo released a new trailer for the game Hyrule Warriors featuring Ghirahim, from Skyward Sword, as a playable character, where you can watch it below.
The game is already available in Japan and it looks like there are some problems for a few users, including freezes, frame drops and lag for the co-op mode. Koei Tecmo already confirmed that they are working on an update. This also means the North American release will get a Day-1 update as well.