I think it's just poor wording. You "take charge" of it the same way you "take charge" of a cat. It either comes when it's called, or it doesn't.. lol.They changed the gameplay ?
I think in the original presentations, they said the catbird couldn't be controlled directly. You have to coerce it using baits, lures and other tactics.
In any event, no reason to get excited just yet. I'm sure they all have placeholder pages for it, this one just managed to mistakenly make itself available to the public.
My guess is, the big reveal at E3, release by the holidays. Whether that's 2014 or 2017 remains to be seen.