Right in the nostalgia. And clearly not just for me. This figurine set seems to hail from 2001, almost 30 years after the original early 1970s Japanese animated series, later remixed for US consumption starting in 1978. It spawned various sequels and a 2013 live action film, and there are rumors of a US live action Battle of the Planets film in the works.
Indeed, this sale also had some other figures that puzzled me for a bit, but it’s another homage. Check this out:
The figures in pink are clearly Princess / Jun, but what’s up with the hair? These are evidently tribute figures made as part of the CY Girls line.