Was personally hoping for an assault on the burning legion. Would be pretty dope to get more of the BC feel by extending it onto their world. Take some portal to Kil'Jaedens world or wherever and push their shit in. But I get how that would feel kinda lame possibly. That ORRRR finish the old gods up. My favorite lore by far for WoW is anything to do w/ the old gods. Was pretty disappointed when the old god raid out of Vash'Jir was cancelled. I don't consider Garrosh turning into a mutant as an old god themed raid. Actually FACING them is what I mean, a la Ulduar/AQ
I assume they're saving all the old 'good/unfinished' storylines up for when WoW seriously starts its downturn. Bliz has always been amazing at keeping an ace up their sleeve, and I really feel as though that older lore is being saved on purpose. I doubt 'Metzen is shit' so much as Corporate Bliz sitting on those goods.