Western River Expedition. That was an elaborately themed E-ticket attraction that was apparently supposed to be added to the MK at some point in the past. I don't know much about it. I get the impression that it got out of the rumor stage and was close to being made, but never materialized. As such, many who are skeptical that things like Expedition:Everest will actual happen point to this attraction that never was as proof that you really can't count on anything until you set foot on the ride.
This one is a different animal. No abbreviation here. What you need to do is sound out and say the whole word. NAHTAZU. NAH.....TA.......ZU. Not a zoo. This was/is Disney's advertising campaign to deal with the perceived identity crisis that the AK suffers from. Seems that Disney determined that many guests believed that the AK was a zoo. However, AK isn't realy a zoo, it is a theme park themed around animals. Many people have a hard time seeing the difference. Hence Disney felt the need to tell people that it is NAHTAZU.
