Holy shit saw this pic today and omg it's awesome. From Forgeworld open day:
The sign says KX139 Ta'unar Supremacy Armor. Bigger then a Knight Titan..and just a few guns. 4 missile pods, 4 burst cannons, the arm-mounted Gatling ion weapons and then the tripple-shoulder mounted weapons of ..awesome.
Man, I can't afford much but this is absolutely on my short list. A Tau Titan is one of those things I always wanted GW to put out.
Now Forgeworld needs to tackle the Great Gargant. :)