Rumors about HTC working with Google on a Nexus tablet have been abundant this year. We've heard quite a few times that an 8-inch or 8.9-inch device would be coming, and that it would be manufactured by HTC, and not Asus - the company responsible for both Nexus 7 iterations.
Now though almost all the details about the upcoming HTC tablet have been leaked. It may be called Nexus 9 when it launches, and its codename is Volantis (or Flounder). It's got an 8.9-inch touchscreen indeed.
However, it comes with a very odd resolution: 2048x1440. That would be a big departure from previous Nexus tablets, which all had 16:10 aspect ratios. The new Nexus is closer to the iPad's proportions, though it's not 4:3 like Apple's tablets either. And that's strange, since the source of this leak claims that the Nexus 9 will have 4:3 aspect ratio. So something's off here, do note that.