Let's guess Dragonflight's main Big Bad!

[Spritz Bergak]

the obvious answer would be the Primalists and Galakrond, since we battle against them when we create our Dracthyr Evoker, but who knows, maybe subsequent patches will bring about new baddies :P

[micwini]

I don't see how it could be anyone else other than Murozond

[Usernameforforums]

No, people haven't forgotten Spine of Deathwing.

Guess what though, just because there's a huge dragon as an endboss it doesn't mean they have to make a spine of deathwing like fight.

Better yet, a spine of deathwing raid

[dirk123]

Seeing how he is datamined, it has to be RAFAAM, THE SUPREME ARCHEOLOGIST!!

[Toppy]

Likely Murozand. Chromie will become the new Aspect of time leaving Alextraza as the only original.