Franchise Killer: The controversial Saber Marionette Z manga. The story is that even though it's by then normal with human women on Terra II, maiden circuits are made for every marionette, and some chose to turn evil. The main marionette, Zero, had Combat Tentacles that she used to absorb the other marionettes and gain their skills. It only reached only 7 chapters with a huge Art Shift in chapter 6. It never was collected into a whole volume. It caused such a stir the whole franchise was put on hold until bought in 2015.
Also the J series ended up being dubbed by Ocean in Vancouver instead of Animaze in LA, so the entire cast was changed. Notably, Otaru went from being voiced by a female (Mona Marshall) to a male (Brad Swaile). Then J to X went to Blue Water in Calgary, presumably due to union issues, and the entire cast was changed once again.
Apple was going to be part of the original series, but she was cut. She appears in the Battle Sabers game, anyways.
Saber Marionette J only has 25 episodes because the 26th was turned into J Again.
Otaru is actually implied to be somehow related to Ieyasu, looking like a younger version of him, and even dreams about the Mesopotamia. Of course, not enough of the Light Novels are translated to confirm this.