From Diablo Wiki
Witch Doctors possess a variety of spells, some reminiscent of the Necromancer; others wholly new to the Diablo Universe. Quite a bit has already been revealed about the character, and on the Witch Doctor skills page you'll learn about mind control skills like Horrify and Mass Confusion, his ability to summon the gruesome Zombie Wall, and his direct attacks using fire and insects. Who do voodoo? You do voodoo!