No new classes, please. I'm just 10/12 on getting the CURRENT classes to level cap and by the look of things, won't even bother to max out all the order halls during this ExPack.
Also, dunno what a new class could actually bring to the table. Necromancer is just a mashup of lock and dk stuff. Any possibly "new" stuff they could add to the existing demonology/unholy -specs.