I recently updated from MVC 3 preview 1 to RC2 and was disappointed when I got no razor intellisense.
In case you ran into this problem I had to remove the change I made to the editor for cshtml files (which I did to get some syntax highlighting)
Tools -> Options -> Text Editor -> File Extensions
remove the alteration to cshtml files
Also I’ve heard that resharper overrides the completion and can keep razor intellisense from working
Tools -> Options -> Text Editor -> All Languages
make sure statement completion is turned on
Hope this helps!