Twin Peaks are another band I could see making it onto the lineup. They're on tour now and just played Seattle but they're growing in popularity and the indication is that they will be playing more shows next year.
Hope we get some more ideas of who might be playing soon. I would love to buy presale but the price with the exchange rate is looking a little high. I can't do both Sasquatch and Pemberton again this year unfortunately so I'll just have to wait until I have more info.