There are still long series like Knight Errant and Invasion.
Actually those were 5-issue minis that spawned sequels.
Star Wars: Knight Errant
Star Wars: Knight Errant Deluge (upcoming)
Star Wars: Invasion
Star Wars: Invasion Rescues
Star Wars: Invasion Revelations (upcoming)
It's similar to how Dark Horse did early Star Wars minis like
Dark Empire and
Crimson Empire, both of which had sequels.
Dark Times and the recently launched
Jedi are expected to be released in this format as well (if anything, though,
Jedi is really a returning title as it was originally a series of one-shots).