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The script will be written by Ian Goldberg, a writer/producer of Once Upon a Time, from a concept by Goldberg and Goyer. Goyer wrote Man of Steel, so is very familiar with the character and the mythos.
Emulating the Gotham approach, which finesses many continuity hassles and provides a relatively clean canvas, is undoubtedly attractive for reasons beyond the storytelling benefits; Gotham has also been the most successful of the new DC series (see "Fox Opts for a Full Season of 'Gotham'").