Will megacasts become mega-popular?

The megacasts demonstrated an emerging model for how broadcast networks can expand their audiences for marquee events while offering advertisers a new way to reach niche segments.

The New Orleans Saints score a touchdown — and the screen gets slimed — during their Wild Card game against the Chicago Bears that was shown on Nickelodeon earlier this year. The game was part of a megacast, an emerging model for how broadcast networks...