The Dragon Ball Z Collection One movie box set was released by FUNimation on November 1, 2011. This five-disc set includes Dead Zone, The World's Strongest, The Tree of Might, Lord Slug, and Cooler's Revenge. There were three slimline boxes packaged in this set; the first contained the discs for Dead Zone and The World's Strongest, the second contained the discs for The Tree of Might and Lord Slug, and the third contained the disc for Cooler's Revenge. The three slimline cases are housed in a cardboard slipcover.
When it comes to the discs in this set, I can guarantee that the discs for Dead Zone and The World's Strongest are simply the discs from the steelbook "double feature" version that was released in 2008. I would assume that the other discs in this set are simply the discs from the steelbook releases as well. While Dead Zone includes a commentary track as a special feature, the rest only have trailers as their special feature.
One of the things that FUNimation plays up on the cardboard slipcover is the fact that the films have been digitally remastered. When it comes to the video quality, I can definitely say that the films don't look nearly as grainy as the Dragon Ball films did after they were remastered. When it comes to the audio, all I can comment on is the Japanese language tracks, since I watched the films with the Japanese audio and English subtitles. The Japanese audio was on the quieter side, but this may be due to the fact that the Japanese audio is in mono, while the English audio is in Surround Sound.
As for the films themselves, Dead Zone is a re-telling of how Gohan meets Goku's friends and the awakening of Gohan's dormant powers. The World's Strongest sees a character named Dr. Kochin freeing his mentor and their lab from an imprisonment in ice and snow, and trying to find the strongest person in the world; this one has to be seen as a kind of "alternate timeline" to the anime series.
The Tree of Might is about a Saiyan named Turles wanting to take over the Earth, and he plants the Tree of Might to try and absorb all of the life on Earth; this is another film that doesn't truly fit into the continuity of the Dragon Ball Z universe. Lord Slug is about Lord Slug and his henchmen coming to Earth and trying to take over the planet. Cooler's Revenge has the character of Cooler, along with his henchmen, coming to Earth to kill Goku in order to regain his family's honor after Goku killed Cooler's brother, Freiza.
Personally, I can only truly recommend this box set for the die-hard Dragon Ball Z fans that must own everything on DVD, and want to purchase this set as an easy way to acquire the first five Dragon Ball Z films for their collection. However, I would only recommend it if you can find it for $20 or less; anything more than $20 is too much for what you get in this set.
I wrote this review after my husband gave me a copy of the Dragon Ball Z Collection One movie box set as a gift.