I guess this has been discussed to some small degree within online RPG circles, but I was unaware of it and think it's worth noting again. Apparently Blackmoor is a location on She-Ra's world of Etheria. Just listen to Bow in this clip...
It even plays an important role in this episode ('The Red Knight').
Now, I know the name "Blackmoor" has a sort of general fantasy feel, such that it could have been arrived at independently by the writers on Princess of Power, but the science fantasy pieces of Dave Arneson's classic setting really do make it a perfect bit of D&D lore to be "honored" in such a way.
Isn't it a fairly common trope in science fiction to have multiple parts of the same organism disagree on things? I remember the two heads the Masters of the Universe character Two Bad bickering on the cartoon. Even the old toy commercial had Two Bad talking to himselves...
There are some really cool roleplaying opportunities that emerge from this idea. Maybe it's been done, but I would love to see an RPG mechanic that could actually model disagreements among parts of one being. Maybe two players operate different halves of "one" character...? A skilled GM, with sufficient commitment to roleplaying from his or her players, could probably set the goals of the halves at odds with one another.
This can even be expanded beyond two-headed examples. At work, I study a bryozoan (or moss animal), a colonial invertebrate. It's brain-warping to think about what it could be like to operate as an individual in a true colonial organism. The bryozoologist Judith Winston delivered a very nice lecture on this sort of thinking entitled Life in the Colonies: Learning the Alien Ways of Colonial Organisms. The entire article probably only interests scientists in very specific fields, but she does describe how her interest in SF influenced her appreciation for such an alien lifestyle:
Right here on Planet Ocean were creatures as bizarre in structure and unique in life-history patterns as any I had read about in science fiction. Many of them were marine invertebrates with clonal or colonial life histories, including bryozoans, the group on which I eventually focused my research.
I suppose people will often play a troupe of characters in RPGs...it would be interesting to see what would happen if these characters could be linked as a unit and presented with situations (and rules) that require a balance of altruism and selfishness.