Worried Hyrule Warriors was going to have full blown voice acting like other Dynasty Warrior games? Worry not, as we now have complete confirmation that won't be the case. However, that doesn't mean there won't be some voice acting, only that it will fall in line with traditional Zelda voice acting. Things like Hey, Listen!, or the gibberish from Midna. So, the game may feature more voice acting then we're accustomed to hearing, but it will fit within the tradition of the series (and this practically confirms text boxes. We all love text boxes...).
http://www.zeldainformer.com/news/hyrule-warriors-will-feature-traditional-zelda-voice-acting#.U4aRuuIpDQ9