Yes. The dark mechanicus got two characters in the chaos book. A magos and magos on abeyant. Theyre interesting. The abeyant gives +2" movement, 1 wound, and a heavy weapon that I would say is comparable to a plasma gun (lower strength, but more damage). They buff an odd collection of things, basically all models that would be available to the 30k line, with +1a and LD. They can also repair the above and dark mech knights. I'm not sure where they fit in an army really, but they certainly make you think about taking one!