Currently, Privateer is doing a sort of 'Ten Days of Christmas in May' thing with the Retribution of Scyrah- every day they're revealing another section of the cover art for the faction book, which will be released in September. So far they're like nothing that's been seen before... or like everything we've seen before. So far people have said they look like Eldar (not surprising), Tau, Necrons, and Space Marines with Heavy Bolters.
You can keep up with the daily reveals here
, including the three that have been done so far.
Right now we have what looks like a Mage Hunter and some sort of armored gun line with really big guns.
Also worth noting: the Retribution forcebook will be using MkII rules- but the MkI rules will be released in No Quarter Magazine. Which suggests possibly the July issue- although I'm expecting it to be multiple issues, with July being more of a teaser.
It's also worth noting we now have cover art for No Quarter #24:
Unfortunately the 'Warmachine goes digital' part seems to exclusively be what we've already seen- just using the Warmachine world to demonstrate software, no full game involved.