Dying Light may not be coming to the Wii U but that has not stopped the developers making several Nintendo references within the game. Previously a series of Mario references have been discovered within the game such as first person, third dimension version of the original Super Mario Brothers world 1-1 which was a pretty cool little easter egg. However the easter eggs do not stop there with a brand new reference to another Nintendo franchise the Legend of Zelda having just been discovered within Dying Light, this new easter egg specifically is about the Master Sword from the Legend of Zelda which one of the characters in the game can be found holding. At this point I do imagine this is far as the references will go with not much more to be discovered, but of course anything is possible.