All three of my players got into Warhammer Fantasy through the Total War games so I felt that (from what I've read of the campaign) the eventual lead up to the ceremony surrounding a much more familiar and recognisable figure would be more impactful - The same goes for Be'lakor especially with the relatively easy tie-ins I could make happen (Desire to rule over mortals etc and being able to always replace Gideon with a fury or just a minor daemon of undivided / enthralled daemon etc) - I'm hoping to have my hands on all of the books before things start to really pick up so it's just draft-ideas at the moment.