Straight from his blog.
http://www.graham-mcneill.com/gmblog/Pe ... 04197.aspx
"Expect to see more Knights when I get round to doing my Martian duology later this year. Note, it’s not set on Mars, but has the tentative title (ie unconfirmed and it may – probably will – change) of Priests of Mars."
A duology about Tech-Priests. *faints*
Has Knights in it. *faints again*