It's an interesting idea. I like immersive environments--it's part of what I love about Disney, is I almost feel like I am walking through a story, however abstract and unstructured... I also love scavenger hunts, medieval re-creation, and other adventures where I feel I have "a role and a goal". For a time we had this incredibly unique and fun restaurant in Seattle called Entros which combined lots of immersive games, scavenger hunt type games, hands-on entertainment with delicious food and drink. I was devastated when it closed...
http://www.gamereport.com/tgr19/randomdraw.html
And it seems that Disney is already playing with this "hands-on, individualized entertainment" idea in the existing parks, with the Kim Possible interactive scavenger hunt thingy in World Showcase, and another PDA-device game that was tested in
Disneyland a couple years back. And then there was the VMK in-park quests, which I loved as well (RIP).
This Jungle Trek rumor sounds like trying to push the envelope of this interactive experience concept. It begins with setting up the story, introducing the environment, and helping you feel like you're "getting into character" in the initial 2 hour tour. Then you have 3 hours to "Choose Your Own Adventure"--more or less complexity and difficulty, and varying in intensity, depending on age groups, physical ability, and interest.
Without having more detail, it is hard to imagine how all of this is implemented, but the idea behind it is really intriguing to me.
Now, would I pay $600 for hubby and I to do this for 5 hours? Sorry, but it's really hard to imagine anything justifying a cost of $120/hour for us to enjoy it together. That price-tag is too high to tack onto an already expensive (and satisfying value-wise) experience that is WDW. We are "backstage-trivia-mavens", and we still haven't been able to justify taking the Backstage Magic Tour at that tour's price!
But the concept itself is intriguing, and I am not ready to poo-poo (Pooh-Pooh?) it out of hand based on current rumors and limited information. I will be keeping my ear to the ground for more information as it becomes available, and withhold judgment until there is real, tangible details released.