It was up the air for a minute, but it looks like they're going forward despite the Mall being booked by other organizations (see this interview where organizer Cleve Jones says he has a permit, and the other events that day either aren't happening or will be friendly). Here's the promo clip:

Of course, this is THE SAME weekend I bought tickets to see Kylie Minogue in Toronto. Jesus H. Christ. My friends who are going with to Kylie wanna go to the march in DC, so I'm trying to work on a compromise where we do both. Yes, that means driving from Toronto to DC on the 10th. Sigh. Better be worth it, Cleve!