Name: Exodus of the Fallen
Why:Fallen refers to a title Sargaras has. Exodus refers to Sargaras' legion who are rampaging the worlds once again.
Races added: none
Why: WoW has enough races by now.
Classes Added: Demon Hunter
Why: Since recent activity of the Burning Legion. Demon Hunters became a very popular job among Azeroth. Friendly warlocks believe and advised to specialize into this profession the know Demons can be very rough to fight to.
Professions added: Carpenter
Why: There is enough wood and nothing has done with it. And because it is necessary for a new feature called Housing.
New feature added: Guild/player Housing
Why: I believe housing can be very cool to bring the players inside a guild, or just friends, even closer together. Housing can motivate to work together even more, which guilds automatically much stronger.
Rooms and furniture can be created and upgraded with help of the new carpenter profession.
Zones Added: 8 new zones. 6 on planet Argus (where Sargaras is) and 2 on Azeroth.
Why: We need level somewhere, right? Argus is a planet like Outlands and will be covered with 6 zones. One of those zones is covered with the Burning Citadel and is double the size of Stormwind. I imagined an architecture of a dark persian/arabic dungeon/underworld/prison. The other Argus zones are just variations of wastelands. Much lands have died long ago and has too even worse then Outlands looks, because Argus was the Legions first victim and they are there the longest. On most corners Legion settlements/fortresses can be found.
The main capital of the expansion is The Exodar. The draenei's have their spaceship restored, which acted like a capital past years, and is ready to investigate their homeplanet Argus. The capital floats on the far side of the planet as seen from the Burning Citadel. The Capital doesn't stay on one place but it travels along a specified path along the planet. The sanctuary city contains no auction house, no bank. It does have portals to the main capitals.
Prophet Velen choose Dire Maul as the location to lift off towards Argus, because of the demon activity that there was had the strongest link with Argus/Twisting Nether. Also if the missions fails. Demons would probably use the same way to go to Azeroth and Dire Maul is probably the best place the stand against that invasion. Both Horde players and Alliance need to travel to there to lift off to Argus.
Before players can go to Argus they need to be level 91. This level can be reached with doing one of two new zones on Azeroth itself both located in around the maelstrom. One zones involves killing Naga and Makrura. The other zone involves Kul Tiras and the Broken Isles and Tomb of Sargaras.
Something happens to Silvermoon as well. New demon activity there. Sargaras/Kil'jeaden want revenge of what happened with the Sunwell. Silvermoon becomes a raid dungeon. This is because of the revamp of Eversong Forest/Ghostlands to make it flyable. Also Azuremyst Isle and Bloodmyst Isle are updated to make it flyable and to remove The Exodar.
PVP Zones added: none
Why: not needed
Battle Ground Added: 2 new battlesgrounds. First is a naval battleground with Kul Tiras. Second is a PvP Raid dungeon.
Why: Naval battles are new for Warcraft and must be kinda cool, gunship was cool too.
PvP Raid dungeon is a new thing as well. While Alliance and Horde fight each other they have to stand against the dungeons forces as well. Also the faction who reaches the end the fastest may battle the final raidboss for extra loot.
Dungeons added: dunno yet
Raids added: Silvermoon, Burning Citadel, Kil'Jeaden's Fortress