It's kind of a long summary, in my opinion. I get that it's from a movie and all(which will make your pool of interested parties smaller, restricted to those who watched and enjoyed the film) but all this information before you get to the basic plot, it feels a bit restrictive. I would not respond to an ad like this because you have all this information about the world and situation, yet the role you're looking to have filled is the more active person, the one who is supposed to be in the ruling class of this society. It shrinks the hoop even further that someone has to jump through. Because you've got all this information about the state of things, you know how the society and mechanics work, yet you want someone else to be in possession of that knowledge. Enough that they could be the assertive and controlling character. I would worry about if I could reasonably portray everything you've planned out while still having enough possession over my own character to create and add to this world.
I would severely reduce the blurb to be something a bit more freeform to give the person writing the assertive character more access to the world building information or more freedom to co-create.
Boom. You've got the players. You've got the relationship you want to explore. Any world building, if it has to be explained at all, can be discussed in ooc talks. But, if you wanted to keep the faceclaim and the core relationship between the characters, I'd erase any connection to the movie other than the faceclaim and name of the SoD. The rest, I'd leave freedom for my partner to co-create with me. Nobody wants to come into a story already written when they're the role that is supposed to know everything and be in control/power. Unless it is from a more popular and easily recognized canon.
The faceclaim chosen for the partner is another thing I'd not respond to. Unless it was someone I really liked the look of. So, just be aware, that is another thing that shrinks the pool of interested parties, since most people want at least that much creative control. Or at the very least, make the way your character looks open for someone else to choose, so, it'd be a trade. They'd play someone you are hot for and you'd play someone they are hot for.