Skelecon is one of those really unknown beyond Germany types, that are cool to have surfaced. I guess whoever invented them just felt Skeletor needs troops that look like him, so more creatures with blue skin and skull. It sort of ties to first MOTU comics where Skeletor was his own race, and in that canon these could be more of his race... if the race is just creatures with blue skin and skull head.
I suppose skeletor having slimepit bone monster and skeleton warriors are next, if S7 gets to them. Its interesting Skeletor troops really has many times had the bone theme going (or robots Filmations and movie), but nothing has really stick beyond one series. Maybe its matter that nothing has been enough unique or iconic yet? I do not have answer, but I could see Skelecon theme of bone warriors expanded with Slimepit monster or skeleton warriors too... would all sort fit together?
Also pretty flawless action figure form compared to the source, without having total redesign, I think its best possible outcome in design.