Why We Never Got To See An Inception Sequel

Inception was a real box office dream for Christopher Nolan. And when the movie was released, the writer-director had already shown that he was also a master of sequels with his batty follow-up, The Dark Knight. So it seemed entirely plausible that Nolan would eventually go deeper into the layers of subconscious reality with Inception 2. But despite an ambiguous ending and some serious interest in a follow-up film, it just hasn't happened yet. Here's why...