Zack Snyder explains why Grant Gustin was never considered for the role

"I am very strict with this universe and I cannot imagine my version of Flash with the tone that we find in the series ".

While tone has been one of the major critical targets in the reception to "Batman v Superman: Dawn Of Justice", for the moment, it seems like there are no plans to change stride with "Justice League" gearing up to shoot next month. 2013's Man of Steel and the previews for Batman v Superman: Dawn of Justice have painted the DCEU as a much darker world, whereas The Flash TV series is more lighthearted and fun.

Obviously, Zack Snyder disagrees as he cast Ezra Miller in the role of Barry Allen for the DCCU, which hasn't been well received by fans. Zack Snyder's BATMAN V SUPERMAN: DAWN OF JUSTICE will hit theaters on March 25, 2016, while the big-screen incarnation of THE FLASH is set for a March 16, 2018 release. However, Gustin agrees with Snyder in regards to how his character would not fit in that universe.

"I just don't think it was a good fit", Snyder told the New York Daily News.

If you're excited to see Grant Gustin go from TV Flash to film Flash, not so fast. "I've never met the guy, but I think he is a fantastic and interesting actor".

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Obviously, Batman v Superman isn't an "exciting and upbeat and happy" film. The production ended up going with The Perks of Being a Wallflower actor Ezra Miller to play The Flash.

Another sign is that comedic writer/directors Phil Lord and Christopher Miller were first hired for The Flash solo movie, yet were replaced by Pride and Prejudice and Zombies writer Seth Grahame-Smith when they left for the Star Wars anthology.

Just because Gustin isn't playing the Flash in the movies doesn't necessarily mean he won't eventually make it to the big screen.

Fans who adore the TV Flash's sunny optimism might not be thrilled by Snyder's explanation, especially since many of those same fans probably dislike the films' commitment to grim pessimism.