film franchise is a bit of an enigma.
Financially, the high-octane, robo-slugfest is an undisputed juggernaut, racking up a whopping $2.67 billion globally at the box office between the first three films. ($2.67 billion
? Wow.) This gargantuan figure places Optimus Prime and Co. behind only Lord of the Rings
, Harry Potter
and Pirates of the Carribean
in terms of average gross revenue per film in a series...