This is making the rounds today showing that the Fires of Cyraxus is on hold possibly indefinitely. That would could be a long time, and is just shy of going bye bye.
information linked via a reader... (thank you) to reddit
Fires of Cyraxus on indefinite hold, 40k rules for 30k Mechanicum models coming soon
I keep seeing a lot of misinformation on this, what the GW folks said on the LVO stream was that Fires of Cyraxus is on hold, no current plans for it to happen. However, 30k Mechanicum model rules for 40k was "top of the list" for a custodes-like release.