When thewas announced a few months ago, my immediate response was, "Why?" Of course the answer is "nostalgia grab," but there's something strange about both of these works and their continued presence in the geek public eye (and perhaps even beyond that). Unlike Transformers which not only has a huge variety of toys both old and new, as well as a long history of cartoons both from America and Japan (not to mention the live action films), both Robotech and Voltron do not really renew themselves, aside from the occasional thing like theor .
Though this speaks more about the people I associate with, I can't say I've ever talked to anyone, online or offline, who is hardcore into either Robotech or Voltron. I know that there's a Robotech community of course (they even have an for it), though I have little interest in it. With Voltron, I know people who have fond memories of it, myself included, but the foundation that Voltron has in geek culture seems not only deeper than Robotech's but to the extent that, when you say cool giant robot with a signature finisher, Lion Voltron is just the default, or it shares that spot with the Megazord from Power Rangers. It's like Voltron as a source of nostalgia goes so far beyond itself that the vague perception of it exceeds the influence of the actual anime.
What's funny about a show like Voltron and its emblematic presence in US geek culture as de facto super robot is that the process of dubbing and adaptation that turned the anime King of Beasts Golion and Armored Fleet Dairugger into Voltron: Defender of the Universe happened with different anime in different countries to similar effect. In the Philippines, Voltes V exploded with popularity. In France and Italy, UFO Robo Grendizer captured attention as Goldorak and Goldrake respectively (with success in the Middle East to boot). In Brazil, Gloizer X became O Pirata do Espa o, the country's first real exposure to giant robots. While it's possible say that this was all a matter of timing and that they're all interchangeable in that respect, I do think that the specific properties of each show had a major impact on how each country perceived giant robots from that point forward (I'm less sure about Gloizer X so if any Brazilians want to help, feel free to leave a comment).
One thing that I do believe plays a role in how these series become more specific in their nostalgic output is the level of support the original works have in Japan. I visited France recently, and when I went into the comic stores I would regularly see displays of Grendizer merchandise. Whether it was theor the or a chibi version, it was all straight from Japan, sitting prominently in the store. Grendizer has enough cultural presence in Japan that it can continue to get these toys and even a fairly stable presence in Super Robot Wars, whereas Golion has had to content itself with . In lieu of support from Japan, Voltron's had to carve its own place, and often times it's not even from the company World Events which holds the Voltron license but from fans conjuring it up in their own minds. And while Robotech is an utter legal mess due to the way it stifles the presence of Macross in the US, if you put that aside part of Robotech's prolonged presence comes from the fact that its fans want new Robotech to constantly feel like old Robotech, whereas Macross changes according to the whims of its dark lord Kawamori Shouji.
Actually I wouldn't mind at all if Voltron got a revival with a solid piece of fiction to support it which doesn't rely too much on nostalgia. I know we got , but the less said about that the better.