Comparing Different Types of Trailers - Introduction

I want to look at the different types of trailers that get made to see if there are any similarities, but also if there are differences specific to the type of trailer. What I've decided to do is to look at 2 completely different types of films that have theatrical trailers, TV spots, and teaser trailers. I'm going to analyse what's in each trailer and then I'm going to have a conclusion to outline what conventions each trailer has. 

The 2 films I am going to look at are: