In the 1990s there was also a wonderful amount of rumors floating about the Internet because of lack of official information and possibly poor translation skills. Rumors I recall are the following:
♅ Sailor Moon is an adult rated series in the original version.
♅ Rei hates Usagi.
♅ Usagi and Minako are sisters/twins/cousins.
♅ Mamoru doesn't love Usagi and only loved her in their past lives when they were Endymion and Serenity.
♅ Makoto is a year older than Usagi, Ami, Rei and Minako because she is taller.
♅ Sailor Pluto is black. (African, African American...)
♅ Sailor Pluto is in love with King Endymion.
♅ Chibiusa is Sailor Pluto and King Endymion's love child.
♅ Tenoh Haruka means "Swinging Cloud".
♅ Haruka is actually the reincarnation of the twin siblings Princess and Prince Uranus and that is why she loves Michiru.
♅ Michiru is straight, but Haruka is gay.
♅ Haruka is straight, but is shy around men.
♅ Haruka is actually a man.
♅ Haruka is actually a hermaphrodite.
♅ Haruka and Michiru have sex in the manga.
♅ Makoto is bisexual because she had a crush on Haruka.
♅ Haruka lives with her father in the anime.
♅ Haruka's father bought her a mansion in the anime so Michiru and Hotaru could live with them.
♅ Naoko Takeuchi dislikes Haruka and Michiru the most out of the Sailor Senshi.
♅ Sailor Uranus' powers are earth-based.
♅ Queen Nehelenia and Queen Serenity are sisters.
♅ Rei and Minako are actually lovers.
♅ The Sailor Starlights are men who turn into women.
♅ Haruka is like the Sailor Starlights, a man who can turn into a woman.
♅ The Sailor Starlights are siblings because their last name is Kou.
♅ Chibi Chibi is Usagi's/Chibiusa's future daughter.
♅ There are more than five seasons to the Sailor Moon anime, but one season hasn't been aired.
There are likely other rumors I've missed or forgotten, but I think that I've supplied a decent enough list.