Vinland Saga released a second visual and a first trailer today! It has also been announced that the main characters will be voiced by Shizuka Ishigami, Yuto Uemura, and Kenichiro Matsuda. The series is scheduled to air on Japanese TV sometime in 2019.
https://manga.tokyo/news/vinland-saga-shows-off-first-images-from-the-anime-in-trailer/