We haven’t seen the last of Garrosh.
It seems like every race is receiving model updates!
Garrosh was taken away in chains after his defeat and put on trial, but escapes before the verdict. With a “friend” that can “bend time” he goes back in time to Draenor during the events of Warcraft 1 with the intent to stop the orcs from drinking the blood of Mannoroth, and unite the old warlords of the Orcish Horde, but this “friend” aligns it with present day Azeroth. Garrosh will not be the final boss.
We’ll be going to Draenor before it was shattered as an entirely new “continent.” It seems to be implied that it will not replace the current Outland.
Karabor, aka the Black Temple is the Alliance main city. Horde will have a new city in Frostfire Ridge, part of which became Blade’s Edge Mountains. Each of the new zones are entirely new, not based on what was already there like Cataclysm was. The Arakkoa have an entire zone called “Spires of Arak” dedicated to their pre-apocalypse civilization. Hellfire Peninsula is called Tanaan Jungle. The name of Netherstorm was already known – Faralon. Horde and Alliance start in entirely different zones.