Why Opening Sequences Are Important?

Within the film industry, the opening title sequence of a film is considered to be the most important aspect of a film. Apart from the marketing elements, the title sequences are the very first images the audience sees. The quick clips lasts about two to three minutes long, in which the filmmaker's intentions and sets up the expectations of the audience. Most films last about 120 minutes, so the first two or three minutes are important in engaging the audience.

It's the norm for the opening sequence to introduce the main protagonist, and to tell the audience who created the film and based on their past work and the opening sequence, the audience will begin to formulate expectations. If someone thinks the title sequence is not very good; their first impression would be that the film will not be good, so I believe filmmakers would consider the opening title sequence of a film the most important way of engaging the audience in their work, as they need to sell the genre they are trying to emulate. An example of this is the film Scott Pilgrim Vs The World, which from the opening sequence you can tell the style and genre the filmmaker is going for.