Quoted from DrStarkweather:
I just think 'Because its an ongoing show!' isnt a good reason for the game to be popular. The game will sell well based on its own merit of a game.
Sure...but Walking Dead has a lot more going for it than simply as a nice TV show license.
Zombies = The first pin to hit the market with this super-popular theme. Zombies are everywhere in media now, and Stern hit the jackpot with this theme.
Comics = Don't forget that TWD was a hugely popular comic before it became a TV show. That stuff is gold for us pinball buying comic geeks.
Stern basically has two main markets...the 30 and 40-something GenX nerds like me who love all things geeky (Superheroes, Tron, Zombies), and a crowd that is slightly older that likes a bunch of nostalgia-heavy iconic 60s/70s themes, and rock bands of the past (AC/DC, Metallica, Elvis, Mustang, Led Zeppelin, Iron Maiden, etc).
Something like Walking Dead is perfect for who they market to.
Pete