To those who haven't watched this special anime, the limited edition 13th volume of the My Hero Academia will include a DVD of this special. The edition also comes with a 50-page booklet featuring Horikoshi's original storyboard for the anime, and original cards for the Boku no Hero Academia Gekitotsu! Hero Battle and Boku no Hero Academia Tag Card Game games. The said volume will be released on April 4, 2017.
[Source: Anime News Network]