Until that contract finally expires, we'll be seeing them...
And really, 2600mAh is pathetic. We already know how it's roughly going to be like. Look at the Galaxy S6 for reference.
That tiny battery really is a shame. I don't see anyone choosing the standard Z over the Force by choice unless the price difference is crazy.
Related note, regarding the lack of the headphone jack. Engadget (I know, rival site)
has an interesting editorial up about this very thing, and how it may affect people down the road. Long story short, by eliminating the headphone jack the manufacturers are putting it upon the headphone makers to include DACs and amps into the headphones, or you'll have to watch what's included in the adapter. Also, these things require power, and headphone makers are not going to prioritize a phone's battery life over sounding good (the editorial notes that a Lightning connector set of headphones noticeably reduced the battery life of an iPhone when in use because it draws so much power).
Count me in the camp that the removal of the jack and a paltry battery in pursuit of thinness that consumers don't seem to care about looks like a big mistake. Maybe this will change in the future, but right now it seems premature.