You can see below the first part of the trailer released before the E3 2014:
Watch_Dogs CGI Trailer (Wii U)
PAC-MAN and the Ghostly Adventures 2 (Wii U)
Tengami (Wii U eShop)
ONE PIECE Unlimited World Red (Wii U eShop)
Pier Solar and the Great Architects (Wii U eShop)
STARWHAL: Just the Tip (Wii U eShop)
Nihilumbra (Wii U eShop)
Teslagrad (Wii U eShop)
Wooden Sen’SeY (Wii U eShop)
Cubemen 2 (Wii U eShop)
6180 the moon (Wii U eShop)
Citizens of Earth (Wii U – 3DS)