Originally Posted by
stigz
I can confirm this is absolutely true.
Pre-expansion event involves Alleria and Turalyon returning from Argus to warn Azeroth of Sargeras' arrival. Turalyon reignites the Knights of the Silver Hand with the help of an avatar of Tyr, who is currently on Argus delaying the coming invasion of the Legion into Azeroth.
Meanwhile, Vol'Jin's temptation to ally with Zul and the Zandalri comes up, as well as Sylvanas' agenda of breaking away from the Horde and leading her undead to Northrend to support her quest in becoming the new Lich Queen that the whispers of a buried essence of Ner'Zhul under Tirisfal have been driving her to do. The Horde is crumbling; Wrathion and Thrall advocate for the true remaining faithful of the Horde to make peace with the Alliance for the coming invasion of the Burning Legion.
First tier brings back Illidan, Kil'Jaiden and Gul'Dan from the Nexus. Kil'Jaiden is going after Illidan, who knows the coming invasion of the Legion is imminent. Illidan trains heroes in his art of Demon Hunting to help stop the invasion and to keep himself from being killed. Gul'Dan is sought by Azshara, who with the harnessed power of Neptulon, has raised the sea level to help Sargeras' Legion invasion with her Naga. This all comes to a head at the Tomb of Sargeras, where the heroes of Azeroth fail to stop Azshara and Gul'Dan's summoning of Sargeras' avatar, which they have to defeat whilst holding back his onslaught of demons he is pushing through from Argus.
Second tier has the heroes pushing Kil'Jaden and the remnants of the Legion invasions back into the Nexus, where Alleria and Turalyon help us follow them through to Argus and meet up with Tyr to try and finish them off.
Third tier has the heroes making the final push through the elite ranks of the Legion on Argus with the help of Tyr to Sargeras himself.
After defeating Sargeras, Tyr introduces a whole new universe of lore to the heroes of Azeroth, spanning eons of time and light years of space.
The beginnings of a fantasy space themed MMO (Titan) are founded with the heroes learning of presences of Old Golds not only on their home world of Azeroth, but on planets throughout the universe that must be defeated to stop forces such as the Burning Legion from manifesting itself ever again from the essences of evil that the Old Gods emanate out into the fabric of existence itself.