The premise is the same in the comic book as the film: In the future, Mega-City One has urban-sprawled its way across the East Coast of America, covering the area from Boston to Washington DC.

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The Urban Age Institute forecasts 27 "mega-cities"--those with 10 million or more people--by 2015.

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"Mega-blocks that are prime examples of bad urban planning" is the assessment of local City Councilmember Letitia James.

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For Walmart, the format may also help them gain access to urban and rural centers that have often fought their mega-centers.

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