Today we got a little bit of our wish granted with an excerpt from the novel on Simon & Schuster's website, along with a shipping date of "On or around July 27th, 2010." Our peek at Ghosts of Ascalon serves as an introduction to the characters, but even more importantly, it might just serve as confirmation of the necromancer class in Guild Wars 2.
Killeen the sylvari is defined as a necromancer in the excerpt: "The sylvari necromancer was probably the most pleasant individual of their motley krewe." Does this mean we'll definitely see necros in Guild Wars 2? It seems like a safe assumption, but as always, we'll have to wait for confirmation from ArenaNet.