The 2015 Darth Vader series isn't perfect, but it's an excellent look at Darth Vader in the time between A New Hope and The Empire Strikes Back that fleshes out his story in ways that make a lot of sense and introduces a lot of interesting new characters. It's easy to recommend this omnibus, collecting the entire 25-issue run, to Star Wars fans.
In broad strokes, this series is about Vader getting back in the Emperor's good graces after the events of A New Hope. It follows the trend of a lot of stories from this period of development of the new Star Wars canon -- it just makes logical sense for this to be the story that's being told here in a way that's very pleasing to my brain. Obviously the Emperor would be unhappy with Vader, but we see him with more power in the next movie, so what happened in between? And now we know.
The series is split into four main arcs and a crossover with the ongoing Star Wars comic series (written by Jason Aaron) that was being released at the same time. Three of the arcs and the crossover are great, while the remaining one is a bit lacking:
The series starts extremely strong with the first two arcs, introducing Vader's investigation into Luke Skywalker, need to prove himself to the Emperor, and surrounding cast of characters. The sort of "dark-side Indiana Jones" character Doctor Aphra is a highlight and good counterbalance to Vader's seriousness, and her two violent droids are even better -- they're my favorite characters in the whole series. Sherlock Holmes-esque Inspector Thanoth is also pretty good and it's a joy to see him battle wits with Vader. Vader and the Emperor themselves are also well captured here; I could read practically every line in their voices and it all feels authentic to their characters.
The crossover with Jason Aaron's Star Wars series is a good opportunity to see some of these secondary characters interact with the main Star Wars heroes, but doesn't have too big of an impact.
The third arc is the weakest, and felt the most like a self-contained story instead of an important part of the Star Wars saga.
And the fourth/final arc wraps thing up nicely while placing Vader in the position he needs to be in for The Empire Strikes Back -- although there's the ever-present issue of Vader being so powerful that he can easily dispatch foes, leading to little suspense once he actually meets his antagonists on the field of battle.
Overall, Kieron Gillen establishes himself a great Star Wars writer who understands the characters and the universe. Hot off reading this series, I'm eager to read the rest of his Star Wars work.
Unfortunately, you may have noticed I haven't said anything about the art. I'm sad to say that much of the art is lackluster -- while Vader looks good in passive shots and the framing and lighting do a good job indicating his feelings without facial expressions, this series utterly fails at action scenes and almost anything more complicated than a close-up of a character's face. The final arc in particular loses a lot of its visual impact with flat-looking full-page space scenes where it looks like tons of ships are right next to or on top of each other and action sequences that don't convey motion in ways that make sense. It really is a shame that the art is so bad, because the writing is so good.
This omnibus also comes with a cover gallery -- some of the alternate covers are quite impressive, I love John Tyler Christopher's action figure covers in particular -- and a breakdown from Gillen of each arc in the series and what his thought process was behind it. This breakdown solidifies Gillen's Star Wars bona fides: this is a smart, Star Wars-loving guy who wrote a great comic series.
Overall, I highly recommend Star Wars: Darth Vader (2015) -- but for the excellent story, not the poor art.