Blizzard said at both 2015 and 2016 blizzcons that the endboss of legion would be someone that had a strong presence in the expansion unlike WoD where Archimonde arrived out of nowhere. Also they specifically said it is someone who we have known for a while.
Argus fits exactly the same spot as Archimonde.. No presence at all except being the boss of the last raid. The world soul Argus will also be introduced in 7.3 or maybe even in the raid only. So no relationship with us players at all!
We also have the Afrasiabi quote of 'take him down and find out' (Sargeras) which is kinda misplaced because looking at the 7.3(.5) spoilers nobody is taking him down instead we have a cutscene imprison him.
So what do you guys think? Intentional misinformation by Blizzard again or did they change their 'plans' like in WoD? If its the latter, what do you think made them change their plans (lorewise).