The Great Diamond Authority
The Diamonds, unique in their flawlessness, sought to expand their perfection across the galaxy. The Great Diamond Authority was the matriarchal body of Gem leaders. Its membership consisted of White Diamond, Yellow Diamond, Blue Diamond, and, prior to Era 2, Pink Diamond. They were once the...
steven-universe.fandom.com
They could not fit any of the lore in but could fit in dozens of filler episodes and shipping that very explicity goes nowhere...The Steven Universe: End of an Era artbook revealed that Season 5 was originally going to have an episode alluding to the origin of the Diamonds, and the Gem race in general, but it was scrapped after the production order for that season got reduced. As Rebecca Sugar put it, the origin of the Diamonds is semi-mythical and the story is now part of "Gem religion" - thus even the version they were going to tell in that episode might have only been in vague or interpretive terms. The artbook also contained a scan of the detailed story timeline that Rebecca Sugar developed years before the show ended, as an internal guide to the writers: the very beginning of the timeline, however, contains a large section which is completely redacted (covered up with black bars). The only hint about its contents is the timeline stamp that wasn't redacted: "20,000 years ago".
- In a different section of this artbook, Sugar explained that they originally wanted to allude to the origin of the Gem race "way back in the Peridot arc". As Sugar explained, she kept trying to find a spot back in the Peridot arc "for her to 'Linus' - like A Charlie Brown Christmas - to recite a long, religious Gem monologue". However, they couldn't figure out a place to fit this long exposition dump that felt like it flowed naturally, so they put it off but thought they'd get back to it by the final season. Sugar said that "Gems are obviously technology" - i.e. they didn't evolve naturally, but they have their "own extensive mythology" that grew up around their origin (interpretive and clouded by legend but with a kernel of truth in it).
SU story decisions are astonishing to this day.
Oh well. I've more important things to focus on.