i hope for necromancer but voted "demon hunter" (it will be called dark-ranger i'm guessing as these two ideas will be merged into one)
I selected Tinker. I feel Gnomes/Goblins are due for some Lore, and the Tinker class could be the first class to have distinct specializations, just like Engineering. If done correctly, you could choose between a Gnomish Tinker or a Goblin Tinker, and your Tinker class would closely mirror that specialization of the Engineering Profession. So, a Goblin Tinker would be more of an explosives guy, while a Gnomish Tinker would feel a bit more like a gadget guy.