From the update:
The rats are rampaging at the moment as the Veer-myn set to launch in May.
Coming later in the year, we’ve got two upgrade kits – one that allows you to build the Stalkers, and the other a brand new unit called the Scourgers. These will be added to the army lists shortly.
These two upgrade kits, whilst not available until later in the year, are both included in our pre-launch army deals, the best way to amass huge amounts of Veer-myn quickly. The Night Terror Mega Army for instance – besides already including 40 Night-Crawlers and 30 Nightmares, also contains the extra upgrade kits to build an additionals 20 Stalkers and 10 Scourgers. That’s 101 miniatures when you add the fact that you also get a Veer-myn Night-Spawn.