Batman v Superman's Zack Snyder might be considered a controversial director, but there's no denying that he's committed to the visual and technological aspects of his superheroes.

Here are seven fascinating facts about his DC Comics bust-up that we uncovered while perusing Titan Books' new Batman v Superman: Dawn of Justice - Tech Manual.

1. Zack Snyder went through a lot of bat logo designs

Titan Books Warner Bros.

Every Batman fan knows that getting the logo right is serious business. Snyder clearly knew this too - here are 30 designs and we bet that wasn't all of them.

2. There is a lot more going on under Batman's cowl than meets the eye

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Titan Books Warner Bros.

Ben Affleck's Batman was hiding some serious tech under his mask - including a throat microphone to get that perfect throaty bat-rasp - not to mention a reinforced titanium helmet. It's a wonder there was any room for his head.

3. The weapon Robin used wasn't a quarterstaff...

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In a world where Batman has guns mounted on everything and kills without blinking, of course Robin would be carrying around a crazy axe/halberd weapon to slice and dice crime on the streets of Gotham.

4. The engraving on Wonder Woman's sword reflects her warrior philosophy

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The writing on Diana's sword is a translation of a serious survival of the fittest/circle of life quote by Joseph Campbell, the writer of The Hero with a Thousand Faces. It reads: "Life is killing all the time and so the goddess kills herself in the sacrifice of her own animal." Brutal stuff.

5. Batman has brass knuckles built into his suit

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This Batman is not messing around - in case there was any doubt at this point. Though these wouldn't be much use against Superman. He'd need kryptonite knuckles for that.

6. Batman has a backup uber grapple gun

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We were a bit puzzled about how Batman could so quickly grapple from place to place (thus avoiding being lasered into oblivion by Doomsday's super vision). Here's our answer, and it's a monster.

7. Lex Luthor's fancy shirts are all for show

Luthor's swanky dress sense was apparently all for show - the clinical laboratories are the true reflection of his calculating personality. "The labs are probably really the only place where you see a little bit of him," said production designer Patrick Tatopoulos. But for the city-levelling monster, those snappy threads might have tricked us too.

Batman v Superman: Dawn of Justice - Tech Manual is available from Titan Books now.

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