I also wish they would add BK. I think it could be fantastic! Like some of the earlier posts stated, there have always been mythological creatures in Disney movies...what a great place to locate them!
If done right, it could be one area of the park to truly appeal to every member of the family. Something cute and tame for the younger ones, something interesting for the older ones, and something to excite the teens.
Currently, myself and DS (12) love the AK. We are both animal lovers and would be perfectly content to walk all day and just look at the animal displays. Other members of the family claim that it is their least favorite park and the biggest reason they give is that there seems to be "less to do" here than at the other parks. They also claim it is because the AK is hotter than all the other parks. So I say, bring on more water rides/playgrounds in order to help keep people cool.