-Jedis are pretty much replaced with something more like witchcraft, it's considered a female-only deal, Jedis aren't really a combative order, they do have magical powers which are great help in combat but it doesn't mark the out as elite warriors, I don't want to go down the path of Star Wars prequels of Jedis commanding groups of soldiers.
-All the principal cast of protagonists are now female: Luke is Luca, Han Solo is Hanna Solo (though still called "Han" for short) even Obi-Wan has been substituted for a witch-type character but still a "crazy old
wizard Witch" up in the mountains. However I realise I've made what might be called an entire cast of Mary Sues! But I am trying to subvert that and make these seem like real characters I think having many different female characters is the key to having real distinction. They have definite flaws and strengths, I hope.
Chewie is now a battered old android left over from the Clone Wars and the R2D2/C3PO are now Elves. Go figure.
-It's essentially a war of the sexes, The Empire is a male dominated extremely-misogynistic authority and part of the oppression of the Empire is basically enslavement and subservience of all women throughout the galaxy. Because that's kinda the problem with A New Hope, why did Luke have such a problem with the Empire? There was no imperative for the characters to really want to overthrow or avoid them.
-I don't think the "vader-father-redemption" from RoJ deal works when Luca's father is a rapist arch misogynist, so that will have to be changed for something completely different though Vader remains her father. Also, Vader is not going to start as a cyborg, he will be put that way by a serious injury dealt by one of the protagonists in the first third of the series and will be "resurrected" to a zombie like state his life dependant on The Emperor's continued existence.
-Also the Death Star isn't destroyed in the end of the first "third" (equivalent New Hope ending) its planet destroying laser is destroyed by a critical hit just at the moment it is firing, this leaves the Space Station crippled without its main weapon but still orbiting the Rebel Planet that is then occupied (invasion of Hoth) and has its resources stripped to rebuild it. So there is no sudden "build another death star" there is just one, that they spend the entire series trying to figure out how to destroy it once and for all (infiltration of Endor). It's all on the same planet.
-I've expanded on the triad of power between The Emperor, Grand Moff Tarkin and Darth Vader: the Emperor in "Pampered Dictator" role he doesn't do day-to-day politics, that is Grand Moff Tarkin's role in the senate and Darth Vader the head of judiciary/military branch, he's the Fixer, the Heydrich, of The Empire. Tarkin does not get killed off in the first third of the saga, this power balance will evolve throughout the series and has a key role in the undoing of The Empire.
-I'll be frank, there is a lot of sex, lesbian bonding, implausible nudity, Tentacle monsters, sex beasts, imperial rapist it's everything from the dirtiest most perverted anime/hentai you've ever heard of. Yep, tentacle rape warning! I hear even Ridely Scott's Alien was originally going to have a tentacle-raper alien but they decided against it after HR Geiger's designs. And we all know what happen to Leia when she was captured by Jabba:
Nothing is left to speculation
Though I don't think I am going too far. Far for fan-fic, but at least it doesn't get as bad as typical torture porn like Saw, Hostel and especially not as bad that title that I can't even mention but I will say it rhymes with Kuman Peinticeed. Frankly, THOSE film are more awful than any fanfic I can find. Really. It's worse than anything I can even think of.
-The violence is extreme and escalates. Luca is a knife toting punk on Tatooine where she depends on that to avoid a terrible fate at hands of Tusken Raiders, she quickly graduates to lightsabres where they are not clean weapons, it's like being hit with a white-hot chainsaw there is no clean cauterisation but an explosion of fire wherever tissue it touches. Blasters too are pretty much mini-localised lightsabre strikes.
One thing I want to do is have Luca using a lightsabre by the time she gets to the Death Star and really the combat aspect is no the special training Luca needs on the Degoba system. You can learn how to fight as you go, but on Degoba the training is something far more subtle to do with inner strength and wisdom, no just learning how to dodge laser blasts and kill.
-lighsabres still feature heavily with Jedi but really anyone can use a lightsabre and not all jedis/witches use them. Lightsabres are essentially common components of industrial cutting equipment. Also no one has them drawn for often by the logic that they consume a lot of power just running that can run out (for plot convenience) also an excuse for many cool quick draws and make them a really special weapon to use. Non-jedis use them but jedis have most benefit of them and will still wield blasters and firearms.
Yeah
-Also on the death star being so huge and spherical it doesn't have a universal direction of gravity like all down in line with the central axis or towards the core, the entire facility is a complex three-dimensional maze of gravity generators, you can have corridors where the ceiling has an opposite gravitational pull so if you jump up you can then be pulled up to the ceiling. You have corridors where the floor bends up and down around 90 degrees and cargo corridors with no gravity, and security lockdowns that set to 4g where everyone weighs 4x as much. There is so much fun to have when gravity can be manipulated
-Yet to spite all this, it is still hugely derivative of George Lucas' original screenplay and others, whole sections are lifted in their entirety, as different as all this may be it is similar enough to be plagiarism. Yeah, Han is a female but I've now essentially written Lara Croft, who is essentially a female Indiana Jones who is basically 1930's Han Solo. Be I'm not confident enough to start a story from scratch.
Imitate, innovate THEN create. That's my motto.