A five-year-long project involving some of the finest watchmakers in the world surely cost far more than $1m, and that watch will sell for much more than that at auction some day.
If it was priced to reflect its complexity it would be probably more on the order of $10m or more. Much simpler movements frequently cost $1-2 million to develop, often higher.
And if Hollywood is to be believed, an expensive watch may be traded to a minor speaking-role character for a plot-necessary object in an emergency. By that theory, this watch is not only a watch, but also a canoe, a pair of shoes, or even a motorcycle.
If it was priced to reflect its complexity it would be probably more on the order of $10m or more. Much simpler movements frequently cost $1-2 million to develop, often higher.