Ideas Of How To Interpret My Film Idea Into An Opening Sequence

I have thought of several ways to interpret my film idea into an opening sequence:

1. The first shot shows the lead character sat in a destroyed office looking downhearted. He flashes back to the trouble that his supposed guardian angel got him into back to where he is now.
2. The opening sequence is shown through the viewpoint of the guardian angel. He sees the dejected business man on the bridge and offers to help him however the audience know that his intentions are sinister.
3. The sequence begins with showing the River Thames through the viewpoint of the business man as he looks down from the bridge. He is then approached by the guardian angel.
4. The opening sequence is a montage of clips throughout the film, for example when the man gets in trouble, when the two initially meet and when the business man is at the height of his success.
5. From the view of the business man's boss, showing his rise from unsatisfactory employee to star of the business then back to where he started.

Each of these options offer different advantages, however, the main obstacle for my opening sequence is trying to convey the entire story in the space of 2 minutes while still leaving room for the story to be told in detail throughout the rest of the film.