* "Sailor Moon Crystal": This is a newer anime adaptation of the original manga, and it's currently ongoing. It's a more faithful adaptation of the manga, covering the "Sailor Moon" arc and the "Sailor Moon R" arc so far. This means it's still ongoing, even though "Sailor Stars" is considered the "end" of the original anime.
* "Sailor Moon Eternal": This is a movie adaptation of the "Sailor Moon S" and "Sailor Moon Super S" arc, which covers the story of the "Dead Moon Circus" and the "Dream" arc. It's more of a continuation of the "Sailor Moon Crystal" series, rather than a new original series.
So, while "Sailor Stars" is the final season of the original 1990s anime, there are still newer productions in the Sailor Moon universe. It depends on what you consider "the last" and "the end"!