Not sure on that one. It is well done, but there are things that referance earlier works that might not be gotten without the original series (which I don't think is avalible). Hopefully that doesn't detract much from the boxed set.
Be as it may, he really doesn't do a lot of "pirating" here.
I started with the "Harlock Saga" followed by the "Galaxy Express 999" films and then "Cosmo Warrior Zero". All of which really don't seem to be apart from all the others, or are connected in some ways but not others.
Now if you wanted to get a picture of Tochiro Oyama (or in WesWorld his great-uncle) you'd need the "Gun Frontier" series. Or perhaps the "Endless Orbit SSX" series, but I had a hard time finding that one...and I mostly have to guess what they are saying, as it is without subtitles and in Japanese.