Wednesday, August 27th @ Black Cat - Windhand
Windhand are being a little cryptic with this announcement...Seeing how this is one day before they play with SLEEP in Philly I am inclined to think SLEEP will also be on this show.
So you're suggesting that (1) they're announcing the opening band first, and (2) that Sleep will play at the Black Cat's Backstage, where this show is presently booked? Seems unlikely.
Based on conversations I had with the band at Deathfest, the Sleep show is a one-off, and the Black Cat show is part of their own headlining tour.