I sure hope so! Demon Hunter is the first thing to come to my mind. I honestly can`t think of many classes that were as frequently requested as the Demon Hunters. And Why not? They have a well enstablished (and awesome) lore. The only problem I can think of is the fact that their signature ability, the Metamorphosis was already taken up by the Warlocks. But hey, in terms of lore we don`t really know how do these metamorphosis really function how dose Warlock's varies from Demon Hunters, if there is any difference at all, and we mostly see Demon Hunters using it. In lore, the first warlock we see uses Metamorphosis was Kanrethad Ebonlocke from the Warlock's Fel fire questline, and his was based on Illidan's knowledge. Demon Hunter's variation. After him, we have several Garrison followers who can use Metamorphosis, though it has an interesting flavor text: "Cast by a warlock pretending to be a demon hunter". They could as well remove Warlock's metamorphosis altogether? Wasn`t it only added in Wrath of the Lich King? Or they could simply make Demon Hunter's to vary from Warlock's? All in all, I'd love to see demon hunters added into the game!