Did not see this any where else(nor had the chance to get the new white dwarf yet) but GW product description for Slaves to the Voices confirms possessed troops choices.
[url]http://www.games-workshop.com/gws/catalog/productDetail.jsp?prodId=prod2440006a[/url]
I only seen rumors on this up to this point just thought I'd share this goodie I saw while browsing GWs online store.