When news spread that Batman and Superman would go head to head in "Batman v. Superman: Dawn of Justice," some questioned how that was possible.
Director Zack Snyder told reporters on Friday that he agrees that the notion is "ridiculous."
However, it also allowed him to achieve one of his biggest dreams for the superheroes.
"Once we had committed to that ridiculous idea... it was only then that we were like, 'OK, that implies that a universe exists where Batman and Superman exist together," he said. "I am and have been obsessed with the trinity and really wanted to see the trinity, that being Batman, Superman and Wonder Woman, in a single moment."
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"That’s the luck and sort of serendipitous nature of this movie that’s allowed the worlds to coalesce," he said. "It became a plan and it’s becoming a thing but it was only in its infancy that we realized, 'Yeah! Oh my gosh, this can be a thing.'"
His producing partner, Deborah Snyder, echoed the sentiments.
"We wanted to set up and introduce these characters but we also had a really rich story to tell," she said, "so it was a careful balance about telling this story - the Batman and Superman story - and giving a little hint and a tease of the Justice League that's yet to come."