I like Vermintide, best L4D-style fun I've had co-op with friends and my cousin since... well since L4D.
However, as soon as I saw Vermintide I thought that it would be a winning formula if only the setting and skin changed to the WH40K side. But I suppose that's due to my bias towards the WH40K setting.That, or maybe because most games set in the WH40K universe released in the past decade were not exactly the type of game I was hoping for, or they simply ended up being bad.
I love me some Warhammer Fantasy, sure, but for me WH40K is where it's at. I would have loved to have the exact same type of game only with playing as Space Marines, Eldar or even Orcs, against Chaos, Dark Eldar and Orcs, etc (or mix and match those factions together or against each others even if it doesn't make sense lore-wise, just for the heck of the action). Even though I like the first one, now knowing that they decided to just stay with that same setting again then I think I'll pass, at least for now (I might "think" about it whenever it gets on a significant sale much later on). I do like, however, that they're implementing Chaos as a new enemy, that's neat (and way overdue, wanted them in the first one for so long even as a DLC that I would have bought... and it never happened). I'm sure it'll be a very good first entry to the Vermintide franchise for anyone who might have passed on the first one though, that's for sure. Maybe for the sequel later on they'll release another enemy faction DLC (the Undead or maybe the Lizardmen).
Anyway, I wish them the best; all I want is a well-made modern action 3D game set in WH40K dammit... asking for too much apparently. The last decent one dates back to Space Marines and that was it. The rest that followed were failures or mediocre attempts at turn-based top-view RPGs or 'tactical' RTSes in space. The only one I remotely might have some interest in if it ever delivers once completed is Inquisitor Martyr, but not even that one is a proper 3D action game and certainly light years away from being in the veins of Vermintide / L4D gameplay wise.