That Necron Mega Monolith reminds me of the opening Pyramid spaceships from the Stargate movie. Especially if the sides can be opened and closed.
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I do not mind the Khorne Lord of Battle model, though it would have been better with the classic Bloodthirster head. The original Epic model had giant wheels at the front and tracks at the rear. A doom blaster, cauldron of blood and cannon of Khorne would also be good to see.
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I hope they also give the other armies some love as well. Bright Stallions, Super heavy Eldar Grav Tanks, Ork Great Gargants / Mekboyz Gargants, IG Collussus and Leviathans, Mechanicum Ordinatus, Mole Mortars, New Dreadclaws, and so on.
By the way, did I mention I love Apocalypse. 150,000 points from 5 codexes, and over 7 CSM legion companies (mostly works in progress though).
I will certainly be glad to see the expansion become up to date with 6th edition.