Microsoft is really taking a long time here to release the next Office for Mac.
It has already been 1,383 days since it released Office 2011 for Mac (the previous Mac version) and 557 days since it released Office 2013 for Windows (the Windows counterpart to next Office).
This is the longest gap ever between two Mac Office versions and also between a Windows version and its Mac counterpart. I have done the maths since 1997, which is when Steve Jobs took over Apple and also when Microsoft announced its US$ 150 million investment to save Apple (and when Bill Gates appeared on the big screen at WWDC to announce the investment together with Steve Jobs, also announcing Office for Mac would be available):
Office 98 (8.0): released on January 6, 1998
413 days after Office 97 (8.0) for Windows
Office 2001 (9.0): October 11, 2000
493 days after Office 2000 for Windows (9.0)
1,009 days after Office 98 for Mac
Office X (10.0): November 19, 2001
*259 days after Office XP for Windows (10.0)
404 days after Office 2001 for Mac (9.0)
Office 2004 (11.0): May 11, 2004
266 days after Office 2003 for Windows (11.0)
904 days after Office X for Mac (10.0)
Office 2008 (12.0): January 15, 2008
350 days after Office 2007 for Windows (12.0)
1,344 days after Office 2004 for Mac (11.0)
Office 2011 for Mac (14.0): October 26, 2010
133 days after Office 2010 for Windows (14.0)
1,015 days after Office 2008 for Mac (12.0)
So, this is the longest gap ever. The previous longest gap between two Offices for Mac was 1,344 days (Office 2004 to Office 2008). And the previous longest gap between an Office for Windows and its Mac counterpart has been 493 days (back when Office 2001 was released).
What is going on, Microsoft?