Exactly what the title says - @ 55:30 in the gamescon unveiling video we are told that " the overall structure of Warlords was good, its enough raid content, and that is what we are aiming for". So that is 7 bosses, and 10 bosses. We get the emerald nightmare and suramar palace.
Im not complaining or anything, I've been waiting for these types of raids for a while - but i have been dying to kill Sargeras for so long now, and with use wielding artifact weapons i don't see why that can't happen. I really thought this would be the expansion that we will face of against this titan.