In the form of Getter Robo G's "Starvengers" dub (which I am sure was distributed on home video under a different name), Getter Robo was my first super robot series (and also my sister's-it probably influences the way she draws robots). It's also one of the all-time most famous and popular super robots in the world. (It owes at least some of its popularity to the difficult-for-English-speakers-to-obtain Getter Robo manga by Ken Ishikawa, which I have heard is mind-blowing.)
So it's rather fitting that in the late 1990s, they would make a Getter Robo series, Getter Robo Armageddon (more properly translated as "Shin [new/changed] Getter Robo: The Last Day," although Armageddon is its official English localization's name and works poetically), which would embody the themes of that decade's mecha and robot series entirely.
Specifically, Armageddon takes elements and themes from two of the most influential of '90s robot anime, Evangelion and GaoGaiGar, and blends them into a single story that also uses elements of the Getter Robo manga to create an incredibly brilliant series which is both dark (like Evangelion) and uplifting (like GaoGaiGar at its best).
Well played, Getter Robo. Well played.
(It should also be noted that one of the most popular mecha/robot series of the last decade, Gurren Lagann, owes a lot creatively to Getter Robo generally, although calling it a "ripoff" is at best disrespectful to the craft that went into the series and at worst closed-minded poopyheadedness. Yes, I'll go there.)