Details here – http://www.tibco.com/company/news/releases/2014/press1337.jsp
AN upcoming webinar which you can register – http://forms2.tibco.com/webinar-amx-bw6-q314.html?utm_medium=pr&utm_term=bw6pagepr&utm_content=textlink&utm_campaign=bw6apr14
It will use Eclipse IDE – this means more seamless usage of TFS via the eclipse-TFS plug in. It is a relief as I am not a big fan of the TFS integration capabilities of TIBCO BW Designer at this point.