I would think the name of the attraction would be a dead (pun intended) giveaway that this is a haunted house type attraction, even if one knows nothing about the show. Just like House of Horrors, it's right there in the name. Now, I would be surprised if, say, The Secret Lives of Pets turns out to be a super scary ride where the animals rebel against their human owners to take over the world and starting treating us as the pets, but The Walking Dead seems pretty obvious what to expect just from the name, no surprises there.