Wrangler is a name used by Ruger for a patent and/or trademark registration.
We know nothing more, other than it may be associated with a Single Six variation.
Remember a couple years ago, Ruger registered a number of patents and/or trademarks, again using the name Security. We know now it became the Security 9. At the time, we knew nothing more, and speculated what the new Security-whatever might be. They are close lipped, preventing any public information until the actual announcement of new releases.