Microsoft has just announced its latest IDE preview release, and we’re here to sim-ship a compatible version of ReSharper Ultimate.
Just get ReSharper Ultimate 2016.3 EAP 9 and install it into Visual Studio 2017 RC. You should be able to install all tools that are included in ReSharper Ultimate, namely ReSharper, ReSharper C++, dotCover, dotTrace and dotMemory.
Granted, both the new Visual Studio and the ReSharper EAP are pre-release products, so issues are to be expected here and there.
Please try installing the EAP build in Visual Studio 2017 RC and let us know how it works for you.