DC will get more metal shows for sure.
OK, at what venue? Empire (formerly Jaxx) seems to be booking a lot more metalcore and hip-hop nowadays. Jay still does the occasional booking there, but it's not the metal venue that it used to be before he sold it. Kreator and Morbid Angel are both playing the Howard Theatre, but I don't see that venue becoming a regular metal tour stop. 9:30 doesn't get a lot of metal, nor does the Black Cat or Velvet Lounge-- sure, there are some, but not a lot. There are tons of DIY spaces (Asefu's, RAS hall, St Stephen's, etc. - mostly booked by Chris Moore from Magrudergrind and by Simon from Midnight Eye) that have sprung up when the Corpse Fortress closed, but those don't book the same kinds of shows that went to Sonar.
vs. Baltimore, which gets metal shows at the Ottobar, the Sidebar, Baltimore SoundStage, etc.
I guess time will tell, but I'm just curious which DC venues you see absorbing the metal shows that used to stop in Baltimore.