Would you be cool with, for example, after MoP or the next expansion, there is an expansion where both factions focus on rebuilding what was lost and regaining vitality, Trying to regain all their forces lost in all the campaigns up , with quests focusing on helping rebuild and not helping destroy. An expansion targeted at guys who play druids and other similar hippies for example.
We could have the Horde and Alliance searching for allies, the Horde maybe befriending tribes of ogres and helping them, while Alliance maybe reconnects with Kul Tiras and tries to solve their problems in return.
An expansion where everything seems brighter and at first it seems there is no apparent enemy to be seen anywhere (actually, there is no clue for any danger brewing, except maybe a raid dealing with the latest minor Zandalari threat, maybe even finishing this long-beaten horse for good on it's own land)
An expansion that focuses on the way that both factions lick their wounds from wars past until... a real hidden enemy strikes. No PTR, no leaks, no anything.
Everything will be veiled untill one morning you wake up, log into WoW and see fire raining on top of your head and you being forced to fight for your life against infernals wich just picked the right moment to use your head as a landing pad into azeroth. A well calculated event to burst out of nothing without a warning.
It allways bugged me how everything now is known months in advance before being released. Won't it be cool to have something surprising once in a while?