How do you delay something that hasn't got a release date?

I must admit I am somewhat puzzled by the news that Blizzard is rebooting their development of Titan and delaying it to 2016. Did it ever have an announced release date *before* 2016? I mean, if Blizzard came out with a huge presentation tomorrow showing lots of features of Titan and screenshots and all, at their usual development speed it would still take until 2016 before the game was released. So in fact we moved from "game we know nothing about with no release date" to "game we know nothing

World of Warkraft...