[HIPPEEDUDE]

You missed one important detail,as quoted:

"and when it does, please don't hesitate to request a "roll-over" to the Special/Collector's Edition of your choice on your existing pre-order and your retailer should happily comply."

This clearly implies there will be more than one version of a CE yet again.
It is also highly likely some retailers will have something other retailers wont as
was done with AC Brotherhood Jack in the Box for example.
In other words heap more money to spend on AC CE for diehard fans,lol