It really depends. You're the one taking the class, so you have the best idea of whether or not you will receive a certain grade. If your teacher is just grading based on length and "I think you have knowledge, so this should be a valid essay," then by bother asking? Regardless, I shall throw in my two cents as to what I found wrong with your essay. They are, after all, arguments.

Three proofs, then something around six paragraphs + introduction and conclusion. Connect paragraphs and thoughts with words that do connect things. Firstly, secondly, lastly, furthermore, etc.

Moving on, you spelled lore wrong consistently. u --> o, and you should be fine. A few nitpicks involve your use of semi colons; avoid them unless you have two distinct clauses, or are separating things off in a group/list. finally, don't talk about what you intend on doing. Just do it. An example is littered in your first paragraph, where you keep saying that your aim is to prove the success of Star Wars. No. Don't do that. State your thesis, state your intended proofs, and get out. Personal opinions should never be stated, and should self evident by your proofs of whatever it is you are trying to prove. Things like "I agree," or "in my opinion" are death notes stranded on a ice pick'd guitar, with its AMP set on 11. Personal pronouns should be used sparingly, and I personally don't use them at all. Learn to eschew them, and you'll save a lot of time; the tones of essays should be disconnected and clear-sounding.

Example:
Star Wars’ success has spanned for many decades, establishing its landmark in 1977. It contained a variety of elements, which were never before combined in a single film, such as; Fairytale/Folk lure; Cold war, and Religion. In this essay I’m hoping to elaborate on the reasons why I chose those three theories, and explain the impact which emancipated from them. Star wars is mainly a film revolving around a young, hotshot hero named Luke Skywalker - from living day to day with the asperities of becoming a professional sky pilot, Luke hastily emerges into a trainee JEDI; serving the purpose to learn the true identity of his father, master the skills and endeavour the gruelling trials of a JEDI, and save the galaxy from the clutches of the evil Darth Vader. My aim is to prove why I think Star Wars deserves to be at cult status, and why it’s a popular blockbuster.
Lure --> Lore
Avoids pronouns until it has been established what you are using them for.
Bolded items are offenders; if I'm reading this, it is obvious that you're intending on showing me your opinion is apt or valid. You don't have to tell me that you think that you're right.

About the length of your essay, it seems quite long, even excessive at times. I don't know how long this should be, but if your teacher told you to catch the bus, you got there about an hour early. I took one look and died a little inside. You seem to go on a series of tangents, needless and don't add to your point at all. There was a whole paragraph on LotR; you know that your essay is about Star Wars, right? Don't mislead, if you want to reference something, make a note of it, and move on, because lingering on details is not conducive to writing. Focus on one character, not all of them. Luke is the hero, yes? Talk about him. If you want Han Solo as the hero, show how in your thinking he is the hero, then talk about him fulfilling the needs of the hero cycle.

Your Cold War argument is the least convincing. Based on what you have given me, I'm not at all sure that you actually know what the Cold War is. You have to at least explain to me what the Cold War is (should take half of a paragraph, at most), and then after that, you have to show how Star Wars is like the Cold War. I found this portion to be particularly weak, even if I had given you the benefit of not knowing what the Cold War was really about. I would highly suggest that you use something else. Based on this section alone, I would've not given you anything close to an A. Assume nothing; explain everything. Yet, you've got to find a balance between length and explanation. I would imagine you need to shorten this by far.

I fail to see how Russia and the States fighting in a quest for global dominance to be comparable to a small rebel group that is fighting against a galactic hegemony. In the case of the Cold War, Russia and the States were both superpowers with satellite nations, and of near equal strength, teetering on a precarious balance before the storm. The rebellion in Star Wars may have been large and an alliance, it was very clear that they were fighting an uphill battle, and the Empire was in total control, stepping on bugs as necessary when they felt slightly threatened. That's just the basics of the Cold War. I haven't even gotten to the nuances. You could compare the Arms Race during the Cold War as your argument to the need of the Empire to create the Death Star, not once, but twice. It would make your life easier, as well as focus on more tangible things, but I have been given no indication of this in your essay, and the argument is in shambles. But you don't HAVE to listen to me. Your hero cycle and religion arguments could have been done better, but I don't see any substantive miscues as I did with the Cold War.

Finally, your last paragraph, the conclusion, should contain no new information, and wraps up the arguments used. Finally, do not use how this post is set up as a rubric on how to write your essay. I've violated the rules, like a hundred times.