While D&D itself seems to be still growing rapidly nearly 10 years after the launch of 5th Edition, WotC has recently scaled back its video game plans, costing up to 15 people their jobs, although they may be able to relocate within the company. WotC spoke to Bloomberg and told the site that they were "still committed to using digital games" and that the change in plans was designed to focus on "games which are strategically aligned with developing our existing brands and those which show promise in expanding or engaging our audience in new ways."
Studios working on games for WotC include Otherside Entertainment and Hidden Path Entertainment. WotC owns 6 video game studios in various cities according to CEO Cynthia Williams in an interview with GeekWire.
We’ve announced six different studios that are first-party and owned. There’s Archetype in Austin that’s working on a sci-fi game that we’re really excited about. It’s a new IP.
You’ve got Atomic Arcade in Raleigh-Durham, that’s working on a very mature G.I. Joe game, and then, Invoke is working on a D&D game. The key piece I’d tell you is that we have been really fortunate to hire some amazing industry veterans, who have a passion for the brands and games that they’re building.
The Bloomberg article also mentions an internal cancelled project code-named 'Jabberwocky', but does not say what that was.