Nobuo Tobita (Kamille) and Bin Shimada (Scirocco) reunites together again... in the Japanese dub of The Simpsons as Milhouse and Krusty The Clown respectively. Except that, in The Simpsons, Kamille is one of the biggest fans of Scirocco instead of his biggest enemy.
Hey, It's That Guy! / Japandering: A rare musical version — the popular opening theme, Zeta - Toki wo Koete was written by '60s pop maven Neil Sedaka. According to The Other Wiki, he actually did write the theme, adapting it from the song "Better Days are Coming" off of his 1972 album Solitare. He also did likewise for the second opening theme (from which he drew upon an unreleased song of his) and the ending theme (from "Bad and Beautiful" from 1976's Stepping Out). This is the reason that they were excised from the US release — Sedaka owns the rights to the songs outside Japan and for whatever reason his clearance was not obtained, prompting generic orchestral music as a replacement.
What Could Have Been: Mamoru Nagano was originally going to have a much larger role in the creation of the series, but due to a falling out with Tomino only a few of his mecha designs, most notably the Hyaku Shiki, ended up getting used. Nagano's version of Zeta would have included:
Axis Zeon having a much wider range of mobile suits besides the Gaza-C and Qubeley, including a gigantic mobile fortress known as the Nahatgall, created as a counter to the Titans' Psycho Gundam, that later became the basis of the Char's Counterattack novels' Nightingale, as well as the Rick Dias and Galbaldy Beta being Zeon MS rather than AEUG and Titans, respectively.
Haman Karn having a completely different character design with white hair and a flamboyant red and white costume similar to FSS's Mirage Knights.
The Hambrabi (which was originally known as the Methuss) being an AEUG MS designed as an artillery spotter for the Zeta's Hyper Mega Launcher. This gets a nod in Gundam Vs. Zeta when Four pilots it alongside Camille in an alternate timeline where Camille joins the Titans.