so...in my search/obsession with trying to find out who they are casting as captain america (not really indie I know) i found an interesting blog post by joe johnston, the director of the movie. He doesn't talk about the movie so much but his take on Previz is really interesting. As someone who finds previz almost essential to get everyone on the same page, it was good to hear about the negatives as well.
http://30ninjas.com/blog/joe-johnston-blog-previz-is-banned-from-captain-america
http://30ninjas.com/blog/joe-johnston-blog-previz-is-banned-from-captain-america