You might as well wait a few more days to see if anything is announced, or at least if any hints are dropped. Personally I will be surprised if they announce a new watch, because yeah... there'd probably be some leaks and rumors.
I'd wait until next week and then buy one. Even if they announce the AW2 in the Fall, it's not like the AW1 will stop working. In fact there will be people wondering whether the new model is worth paying for, or if they are better off just getting the original at a discount.
Sean