Research- Narrative functions

I have been considering the purpose of an opening sequence in order to establish what I want to achieve for ours.
I want the opening sequence to do a number of things :

• Introduce the main character/s of the thriller
• Captivate the audience's interest
• Establish core theme and genre (thriller)
• Establish the audiences expectations by showing use of the typical conventions of a thriller
• Give a good insight into the film