As Batman and Superman do battle on the silver screen, we've taken a peek inside the DC chapter of the "Impossible Collection" -- a new showcase of over 1,000 DC comics, on show in London. Click through to check out the collection, and some of its rarest artefacts.
The jewel in the collections crown are two copies of Action Comics No. 1 -- the first appearance of Superman, and the book that kicked off the golden age of comics.
The copy shown here on the right was once stolen from actor Nicolas Cage, who later had the edition returned, before it was sold at auction for over two million dollars.
