I love the use of greyscale filter in "Memento" in order to relay past story elements. The transition to color allows for a very simple, yet effect flashback sequences which do not confuse the audience and also propels scene changes without any jarring or abruptly stopping the flow of the movie. I believe this element would work well in the "detective" portions of the film. Furthermore, I believe that adopting this style of flashback could coincide well with the scene changes from car ride to climax.

Story Stub

1.
The Devil comes to Seattle. He puts on a play with the help of his assistants for the public, which defies both space and time. People start disappearing as they investigate the case. One of the disappeared happens to be the lover of our main character who deigns to demystify the Devil's charade.

2.
Martial law is declared across the nation. Many civilians opt to enter the FEMA camps stationed around isolated territory to escape the turmoil between NSA soldiers and the resistance. As casualties increase on both ends, one small group decides to level the playing field and disable the Grid.

3.
John spends his life traveling. He would struggle with loneliness if it wasn't for the face that John's travel suitcase is self-aware and talks. The only issue is that during a flight, the suitcase was dropped and thrown off kilter, now John and suitcase must travel the world in search for the missing parts and get suitcase back on track.