SQL Server 2016 will include JSON support. First functionality (FOR JSON clause) is available in CTP2. Here you can see an overview of FOR JSON clause that is available in SQL Server 2016 CTP2.

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http://blogs.msdn.com/b/sqlserverstorageengine/archive/2015/06/08/for-json-clause-in-sql-server-2016-ctp2.aspx