I have everything mantic produced for this army, and then some. they are all decent kits, i just wish the troops were not metal/plastic hybrids.
Mantic's Empire of Dust range - I still think these chaps look pretty good. They're serviceable as Tomb King proxies at any rate until GW finally decide to release new plastic ones for The Old World.
Some of the small miniatures that are going to come with this game would look good as Tomb King characters, and there's also a great new Tomb Scorpion sculpt in there too:
They do look good. I must admit I wasn’t a fan of their Battle Sphinx/Dread Sphinx, but the Ushabti and now these Necropolis Knights and Sepulchral Stalkers look great.