Transformers: The Last Knight Optimus Prime Voice Changing Helmet Announced October 30, 2016 Collectibles A few weeks back at New York Comic Con we saw the first product to be announced from the upcoming Transformers movie, The Last Knight. This super detailed helmet will change your voice to sound just like your favorite Autobot leading Prime. We’ll have to wait until Spring 2017 but we know it will be worth the wait! Share this:FacebookTwitterPinterest Leave a Reply Cancel Reply Your email address will not be published.CommentName* Email* Website Notify me of follow-up comments by email. Notify me of new posts by email.