Well, this is the first part of my planning and I've been asked to answer a few questions, which are as follows:

What is a film opening?
A film opening is the primary/establishing shot of a film, the section which sets the scene for the viewer. It tells the viewer where they are, when they are and who they're with. It basically sets it all up for the rest of the film.

How much is revealed about the storyline/characters etc. in the film opening?
Generally in a film opening, we learn who our main characters, where and when the film is set and also from who's perspective we are seeing the film from, be it our own or a particular character's. In terms of how much we learn about the characters themselves, we learn very little. Yes we learn who they are, maybe their name and where they're from etc. but in general we do not how they have come to be where they are, what their past experiences are or what they are planning to do/how they're going to do it as that's where the film gets it plot. This is also true for the storyline, we only know from the film opening where its set, who's involved with it and a rough idea of when it is. For what's going to happen, we generally know very little. This is because the whole point of the film opening is to draw in the viewers attention and keep them interested as to what's going to happen so as to keep watching the rest of the film.
In general then, we only learn the bare essentials about a film in its opening, only because if we knew more than that, we'd get bored and so wouldn't want to see the rest of the film.

Genre-what types are there?
There are over 20 popular genres in the film industry, examples include:
Action, Adventure, Comedy, Crime, Erotica, Faction (A fuse of factual events and fictional representation of these events), Fantasy, Historical, Horror, Mystery, Paranoid, Philosophical, Political, Romance, Saga, Satire, Science Fiction, Slice of life (A section of a persons life, can be ordinary with no plot at all, just stands to present part of somebody's life), Speculative (A type of fantasy where worlds indifferent from our own are portrayed and how they may run, like a parallel universe), Thriller & Urban. Then of course you have your spin-off's and fusions of these genres to create sub-genres such as Rom-Coms, Horror-Mystery etc.