Writers Block- Need Convoluted Plot Ideas (Like Christopher Nolan?)?

I am an avid writer, and enjoy complex stories. I need an idea for a new idea, which is very complicated. I am a huge fan of Christopher Nolan, who wrote Memento and Inception. I would like to develop a story that is like one of Nolan's- something that is complex and makes the reader/audience member think. I want a mysterious plot, in which I will be able to incorporate twists and turns. My tentative title is something on the lines of- Enigma. It is a fitting title for a complex and mysterious story. So, I need help and would appreciate many responses! Thanks