Osheaga is two weeks after Pemberton in Montreal. They're announcing some (or all?) of their lineup through a mobile game and so far they have:
The Black Keys Kendrick Lamar Florence and the Machine St. Vincent Alt-J The Decemberists Hot Chip, Weezer Nas Tyler the Creator Interpol The Kills Caribou Run the Jewels Future Islands The War on Drugs Father John Misty Ben Harper and the Innocent Criminals The Avett Brothers Of Monsters and Men Brand New Tove Lo Charli XCX Gary Clark Jr. Action Bronson Schoolboy Q Edward Sharpe and the Magnetic Zeros Young the Giant Patrick Watson Twin Shadow First Aid Kit Toro y Moi Philip Selway MS MR Viet Cong Alvvays Slyvan Esso Milky Chance Marina and the Diamonds Raury Strand of Oaks Glass Animals San Fermin Young Fathers
They're having a contest to guess the day that the lineup will be released. The deadline is March 15th so we won't know the lineup until after then. I can only hope that it's not too much longer after then.