One key differentiator between this firm and other startups is its well-connected CEO who wields years of marketing experience. Nicky's dad -- and Unreal's chief -- is Michael Bronner, founder of Digitas. He set up that agency in 1980 and served as chairman emeritus until 2006, the year he sold it to Publicis Groupe for $1.3 billion. From there he went on to found UPromise, which was sold to Sallie Mae for $300 million. To round out the team at Unreal, Mr. Bronner recruited Carlos Canals, who has served as president-CEO at Tribe Mediterranean Foods and earlier held that same position at the Kashi division of Kellogg. Others on the team include a former Googler, a former P&Ger and innovative chef Adam Melonas.

Unreal's proposition has sparked the interest of venture capitalists, who are kicking in. And it's won another key battle: distribution.

CVS earlier this year became the first major retailer to carry Unreal. It was followed by Rite Aid, Walgreens, Wegmans, Kroger, BJ's Warehouse, Michaels, Staples and, in a major coup, Target . In fact, the Venice TV shoot last week, orchestrated by Backyard Productions, was for a Target ad.

Mr. Bronner has also approached famous friends such as supermodel Gisele Bundchen; her football-star husband, Tom Brady; and Twitter's Jack Dorsey to endorse the product via YouTube videos and on their social networks.

On the agency side, Unreal has retained Big Spaceship for a digital onslaught to help push its candies as an alternative to those from Mars and Hershey. Those companies either declined to comment or could not be reached last week, while reps for Mr. Bronner said he was too busy to talk ahead of the Halloween push.

Now, Unreal is focused on its biggest challenge: getting consumers to buy Unreal instead of the brands they've known their whole lives.

Mars, Hershey, Kraft and Nestlé (in that order) control more than 65% of the candy market in the U.S., per EuroMonitor data. Can Unreal bite off a piece of the $30 billion candy industry?

New England Consulting Group CEO Gary Stibel, who has worked with Hershey, said he thinks so. "Look at a brand like Annie's," the maker of organic pastas, snacks and condiments, Mr. Stibel said. "If executed well, there's a lot of potential. People are looking for brands that have a purpose and mean something. Is there a value proposition with Unreal? Absolutely."

Added candy consultant Randy Hofberger, "Will [Unreal] get a little part of the market? Yes. Will they get enough that it will drop Mars' sales by 10%? No."