World of Warcraft: Legion will feature a new class (Demon Hunters for Night Elves and Blood Elves only), a level cap of 110, new raids and dungeons, a new honor system, class order halls, a new Broken Isle continent, a customizable artifact weapon system. Those who loves the Lore behind World of Warcraft will find this expansion somewhat interesting.
In addition, Blizzard also noted that the expansion will see “through Illidan’s eyes”, the story of Demon Hunters and their past. The narrative will heavily involved the Black Temple, and direct references and comparisons to Burning Crusade were made.
From all of the expansions that Blizzard have announced, I must say Legion looks very interesting and something to look forward to, ever since Burning Crusade.