As far as I can tell Voltron: Defender of the Universe, never made it to the UK, which is disappointing, I loved this TV show when I was a kid. This fan-made film adds a level of darkness to the canon. As Susana Polo of the The Mary Sue rightly points out this has an almost BSG level of realism to it.
I love the Quote:
This is how the mighty fall, Not with a roar but with one small last breath.
I think there is a cartoon reboot of Voltron being aired, I’ve not had a chance to see it yet though.
Via The Mary Sue