Someone on the Walther forum was snooping patents...
https://patents.google.com/patent/US...lther&sort=new
This one, specifically, is for a new slide/frame interface where the rails run through the center of the frame (as in, not on either side). That's pretty neat. I guess it allows the gun to have a thinner profile overall.
You can also see what looks like side-by-side feed ramps in the frame (so, maybe some kinda dual-feed mag?), a manual safety and a striker-fired mechanism. If you dig a little deeper in Walther's list of patents, you'll see a design for a new extractor (which appears to be "special" in some way--though my eye for schematics is lacking) and some kinda VP9ish slide-rack-assist nubs. There's also a design in there for new space-efficient mags (which don't appear to be dual feed?).
While patents certainly don't definitely mean there's gonna be a new gun... what's there all seems to be oriented around this idea of a small, slim, hi-cap pistol. So, I feel like we'll see something. Eventually.
Here's a link to thread on the Walther forum: https://www.waltherforums.com/thread...atents.130536/