Christopher Nolan's ‘Inception' - his mystery-cloaked follow-up to ‘The Dark Knight' - has only been shooting for a short while, but already a teaser trailer has made its debut online, over at Yahoo! And it's damned intriguing...

It's pretty damned impressive, and slightly reminiscent of ‘The Matrix' in its trippy, free-floating, gravity-defying style, and it's not at all what we were expecting. We still haven't the foggiest about what's actually going on here, but there's no doubt that it's going to be cool. Very cool.

In fact, with Nolan on board as the driving force, an estimated budget of $200 million, and a cast that also includes Cillian Murphy, Ellen Page, Joseph Gordon-Levitt, Marion Cotillard, Ken Watanabe, Tom Hardy and Sir Michael Caine, ‘Inception' could be the dark horse of summer 2010.

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