While I want the 8-25, I have your reservation as well. How big/heavy will it be? And what is the cost?That's why I like mine and keep it. I doubt the rumored 8-25 f4 Pro will be small and light. I hope smaller, lighter, and cheaper than the 7-14 f2.8 Pro or PL 8-18 f2.8-4 though. (weather-sealed too)
As I get older, I don't want to / cannot carry the kit weight I used to.