According to this post intellisense should also be working on the new VS 2015, but so far I only get intellisense for the angular object and not for the dependencies or my c
i had this issue.
The visual studio IDE will scan any js files referenced in the HTML files and use them if neccesary (for the intellisense etc).
My problem was i was referencing Angularjs using the CDN/http:// addresses and thus Visual studio did not have any information on angular.
Try downloading the angularjs js file directly and include in your project and reference in your index.html, rebuild (just in case) and try again and hopefully it should work.
Hope i helped.