Teasers vs trailers

Monster's University
This trailer includes:
-Introduction to main characters
-Scenes from film
-Background music
-Release date
-Film title
-General idea of story
-Informs the viewer that they can watch in 3D
-Production company titles

Insidious 2

-Background to story (information on first film)

-Atmospheric background music

-Shots that establish location

-Introduction to characters

-Scenes from film

-Names of other films made by production company

-Release date

-Tagline

-Film title

-Release date

Paranoia

-Brief character profile/introduction to main character

-Background music

-Establishing shots of city

-Information on Director's previous films

-Clips from the film

-Vague release date

-Tagline

-Film title

-Coming soon

-Possible Twitter trend

Aurora
-Production company name
-Establishing shot
-Background info to film
-Brief intro to story line
-Brief intro to 3 characters
-Film title
-Film website
-Names of those involved in film quickly shown at end
-Atmospheric background music

Last Vegas

-Introduction to main characters

-Vague release time

-Tagline

-Brief intro to story

-Actor's names

-Film title

-Background music

Anchorman 2

-Introduction to 4 main characters

-Diegetic noises

-Quiet background music

-Mainly dialogue by characters

-Introduction to comedy genre of film

-Film title

-Year of release