What happens at the start of a film?

The institution idents appears:

Well known idents are production companies such as Warner Brothers, Universal, 20th Century Fox, Paramount and more...

For example "Warner Brother Pictures presents..."

Then the title sequence comes in, introducing the cast and crew...

Music is key when setting the mood for the audience. The James Bond franchise tend to top all movies when it comes to setting the scene with music. 

An establishing shot is vital to the audience to understand what and where something is happening. Here we have Star Trek's establishing shot which happens to be the camera zooming out from a particular point to revel that the film is set on a spaceship in Outer Space. 

As well as having a establishing shot the opening scene must introduce the characters, what time period the film is set in, using M.E.S, the location to which something is happening using different camera angles to show where the characters are, and a reference to the main plot of the story. In the clip below of Star Trek, it has all the elements mentioned, thus creating the ideal for the start of a movie.