The rules for the Kastelan Robot Maniples are out. They are now as we are talking all over the internet showing us that the new robots have protocols that can be changed as the battle progresses. Also shown are many of the new rules and and equipment that we will be seeing.
Here is where you can see the new leaked information. The robots are monstrous creatures with 3 wounds and a toughness 7. Their guns are extremely anti-power armour, especially when combined with the protocols. Of course you can also keep their power fists. Very cool, but I had figured there would be a more anti-armor weapon upgrade somewhere.
http://imgur.com/a/PQi9K
http://www.bolterandchainsword.com/topic/305781-rumours-cult-mechanicus-knights-kastelan-wd-leak/page-35#entry4025260