It appears Office 2013 is well on its way.  Three of the teams have already made formal announcements via their blogs.

From the Official Microsoft Word Blog:

http://blogs.office.com/b/microsoft-word/archive/2012/07/30/introducing-word-2013.aspx

From the Official Microsoft Excel Blog:

http://blogs.office.com/b/microsoft-excel/archive/2012/07/18/introducing-excel-2013.aspx

From the Official Microsoft Access Blog:

http://blogs.office.com/b/microsoft-access/archive/2012/07/20/introducing-access-2013-.aspx

James