Pretty sure it will be pretty much just the watch. Hopefully an iPad mini 4 is announced, however, I HIGHLY, HIGHLY, doubt that will happen. Just hate that the mini is always a step behind the full size iPad now. I like portability. That shouldn't mean I have to be forced into old technology.
Maybe there will be an iPad pro announcement. Maybe a retina MacBook air announcement. Maybe an iPod touch 6, who knows. I just am curious whether 2 full hours will really be spent on JUST the watch or not, highly doubt that it will. Excited to see what may be in store for us on the ninth. Possibly the remaining A5 devices will be dropped, giving us some insight in what that might mean for iOS 9. Pretty eager over here.