Blackrock Foundry is upon us! There hasn't been much in the way of guides yet since the fights have only been available on the beta or ptr, but here are some previews of what to expect. Note that all of the videos I am posting are from the beta, so obviously some things may have changed but the fights should be mostly the same. I will update with the video guides for the live versions as they become available.
The raid is divided into four wings. I haven't been able to find much info about the order you can do them in but someone said you can pick from either of the first two fights in a wing to do first, but then you have to complete an entire wing before unlocking the next one. If this is true, as an example, you could do either Gruul or Oregorger first but have to do both of them and The Blast Furnace before moving on to Wing 2. I'll update once we figure this out.
Wing 1: The Slagworks
Gruul (that guy we killed already) Video Guide / Written Guide
Oregorger (rolly polly boss) Video Guide / Written Guide
The Blast Furnace (trash waves with better loot) Video Guide / Written Guide
Wing 2: The Black Forge
Hans'gar and Franzok (everyone loves conveyor belts) Video Guide / Written Guide
Flamebender Ka'graz (lots and lots of fire) Video Guide / Written Guide
Kromog (Kologarn from Ulduar, remastered collection) Video Guide / Written Guide
Wing 3: Iron Assembly
Beastlord Darmac (hunters can be raid bosses too) Video Guide / Written Guide
Operator Thogar (getting hit by trains, the boss) Video Guide / Written Guide
The Iron Maidens (the worst boss trio since those pandas in SoO) Video Guide / Written Guide (not yet available!)
Wing 4: Blackhand's Crucible
Blackhand (the compensating with a large mace guy) Video Guide (not yet available!) / Written Guide (not yet available!)