Nothing really to elaborate on. Some product appeared on RCgroups that looks similar to WKM and at the same time there are some rumors around that some of the development team from DJI split off. All rumors if true or not etc. The product thread was closed again because they mentioned the factory cant produce the wanted units for them at the moment.
Now if they took some of the source code or not whatever. What this means is all speculation. First you need the cash to pull things off than its not only development but you gotta know how to and want to run a company, resellers distribution net etc.
In the end only we as customers can profit from it.