Now, let me just state as disclaimers:
- I don’t mind the idea of re-telling classic stories with a reversed perspective
- I certainly don’t mind the idea of re-telling adapted stories with an emphasis of pulling things from the original material that were missed by the best-known adaptation
- I don’t mind the idea of writing erotic fanfiction of classic stories
- I don’t mind mash-ups with characters from multiple classic stories (as long as the inclusion of all those characters makes sense)
- I don’t mind modern retellings of classic stories that were originally told as period pieces, and
- I don’t find BDSM stories to be particularly to my taste, but I understand that others do, so I don’t have any problem with them.
For instance, I enjoy the novel Wicked (categories 1 and 2, with hints of 3 and 5), Into the Woods (2 and 4), the first couple seasons of Once Upon a Time (4 and 5, dipping into 1 occasionally), and the novel American Gods (4 and 5).
That said, the story described, which seems to have all six elements, just seems like a mess.
I think there’s definitely potential for a perspective-reversed Aladdin (despite, from what I’ve heard, the Broadway musical Twisted being rather awful), and even more so, Hercules (as Hades generally isn’t a villain within Greek mythology).
I can kind of see the argument for a crossover to happen in modern times, as sultanates didn’t exist in the time of Ancient Greece. I think it’s a bad decision (setting Aladdin in modern times makes all of the characters a lot less sympathetic), but the idea is probably salvageable. With a very good author.
Turning that story into erotica, though, and specifically BDSM erotica… It’s too many twists on the concept. It stretches the idea of fanfiction to the point of self-parody, and it looks like, by stripping the fantasy elements out of the series, that the author is trying to take it all a lot more seriously than the concept can sustain.
It just sounds like it would have been better doing what 50 Shades did in respect to Twilight (or, for a more tasteful example, Dennis L. McKiernan’s Faery series and the fairy tales it’s based upon), and filing off the original’s serial numbers, if they were going to deviate from the setting, premise, genre, themes, plot, and characters so completely.