Personally I'm not planning to pick one up on release. My 7D is "good enough" for the time being, but it is going to be very tempting to pick up the 7DII in a few months after reviews start coming in. However what I'm more interested in personally is just how far New In Box 7Ds will drop in the next few months. I almost jumped on one when B&H had their prices slashed heavily, but they weren't shipping to Canada at that price, and retailers up here hadn't dropped by nearly as much.
I could get a lot of use out of a pair of 7Ds for another year or two till the price of the 7DII levels out enough to better match my gear budget. (And I generally prefer to work with a matched pair of cameras if they're filling similar roles. But I would happily work with a pair of 7Ds while having a body or two from the 5D family on hand.)
Canon EOS 7D | EF 28 f/1.8 | EF 85 f/1.8 | EF 70-200 f/4L | EF-S 17-55 | Sigma 150-500