What I Want:
Sandbox open world campaign.
Something very similar to Total War but with recruitable Heroes with abilities like Mark of Chaos had.
Army Painter like Mark of Chaos, but no real need to have all the customisation so that it can retain some modability.
Massive battle maps and a World Map which spans the entirety of the Warhammer World.
Creatures and civilisations which appear only in the background. I will be very disappointed if Kislev does not make an appearance. For that matter, I'd like Fimir and the like as Rebel/Bandit groups.
Naval combat with ships, sea creatures and spells.
What I Fear We're Likely To Get:
Something VERY similar to Mark of Chaos with a linear campaign.
No Army Painter.
A World Map of the Empire.
Armies consisting of four-six of GW's most popular armies: High Elves, Empire, Dwarves vs Dark Elves, Chaos and Greenskins. Maybe some Skaven, Undead and perhaps Bretonnia. But I'm not holding out much hope for those later ones.
Little to no modability.