Ok, here's where I stand on The Walking Dead scare attractions (and any other zombie one for that matter).
They're ****. They're passive experiences for the guests, the same as why Saw Alive just fundamentally doesn't work. You go passed scenes of people being killed/zombies eating someone, there's no malice, threat or interactivity put on to the guests whatsoever. When you're in an attraction that has a different narrative, such as a haunted house for example - this rule doesn't matter, it's about the visual aspect and your brain understands that you'll be witnessing scenes of paranormal intent, there is little to no malice towards guests and that's intentional.
Zombies as character have threat to the audience, their primary aim is to damage, kill and eat human beings (well, modern zombies are, not actual 'zombies' but that's a whole different argument). So, when you're going around the attraction, through it's many passageways and scenes, all the characters do is lunge towards you, grabbing out and groaning - with the first one, your brain knows that it's not real, it won't happen and there's nothing to be scared of. Obviously, there are jump scares throughout these attractions and that's the only part of the experience that keeps the momentum moving forwards, if it was just characters moaning and groaning, you'd soon become desensitised and bored straight away.
The only way to make this genre of attraction work is by making the experience completely interactive for the guests. Having them 'hide' from the characters, crawl, climb, taste, move objects and 'escape' from a horrible scenario - this won't happen because it's Universal and that type of attraction has incredibly low throughput in comparison, plus, you alienate a vast majority of your audience with these interactive techniques. The other possibility is to add guns to it, so the guests shoot the zombies, this has been done at several large parks in the USA and Europe (Knotts and Busch to name a couple), but there are two massive issues with this: 1) It becomes a game, the guests aren't interested in being immersed in a narrative or experience, they just care about shooting the zombies, 2) The zombies have massive sensors on them with big flashing lights and it looks absolutely **** STUPID.
Example:
So yeah sorry for being pessimistic, but it's gonna be **** - the general public will love it because "OMGZ IT'S DA WALKIN' DEAD N ZOMBIES N STUFF", but in reality, it'll be an excessively mediocre experience for any fans, or anyone with little knowledge of scare attractions/haunted houses.