SQL Server 2016 Community Technology Preview 2.4 is publicly released and the latest SQL Server bits can be found at http://www.microsoft.com/en-us/evalcenter/evaluate-sql-server-2016.
MDS Excel Add-in can be found at : https://www.microsoft.com/en-us/download/details.aspx?id=47343
In CTP2.4 MDS introduced feature to extend Business Rules conditions and actions.
Business Rules Extension
You can apply user-defined SQL scripts as an extension of business rule conditions and actions. SQL functions can be used as a condition. SQL stored procedures can be used as an action. For more information, see Business Rules Extension (Master Data Services).