The Adeptus Mechanicus rumors continue with the first unit type, a heavy support Walker called an Onager. Not a lot of details, but it appears they come with some sort of an invulnerable save that can get better with additional walkers.
Please remember that these are rumors. This has all the signs of a mini-dex, or supplement. The rumors have it at 85 pages. That is quite a bit short of a full codex, but doesnt take away that I will have to jump on board this one, and start a new army. We also have no idea on the timeline, but it would be odd if this was not coming soon after Harlequins with all the information coming in from different places.
via an anonymous source on Faeit 212
a heavy choice walker called a Onager Dunewalker will be part of the skitarii. they are an armor 12 walker that comes with overlapping forcefields that give an invulnerable save. each additional walker in the squad increases the save by 1. they come with a conversion beamer type weapon that is more powerful up close and disperses to a large but weaker blast at longer range. squadrons up to 3.