Windows Phone 9, Office 2015 and Windows 9 could arrive as early as April, according to the latest rumors.
Microsoft has not said anything officially but according to a leaked document we would be able to download Windows 9, Windows Phone 9 and Office 2015 as early as April of 2015. In the leaked document we can see that Windows 9 is in its building stage (alpha) and that we could see a preview release around Q2-Q3 of 2015.
This next piece of information was not in the document but other rumors say that Windows 9 could be named Threshold but the name is one of the least important things. Microsoft will be holding its Build Developer Conference in April which is the perfect opportunity to announce Windows 9.
Other rumors about Windows 9 say that it is going to be able to run Windows Store Apps on users desktops, a unifying app store and a mini start menu. We still have to wait quite some time but hopefully more documents will be leaked soon so that wait doesn´t seem as long.