Star Wars: Vector

When Dark Horse Comics owned the Star Wars license, they had four lines of Star Wars comics concurrently running:

1. Knights of the Old Republic 
Set thousands of years before Episode IV, KOTOR dealt with a Jedi padawan Zayne Carrick as he fled his Jedi masters, who were trying to prevent the return of the Sith and had foreseen (correctly?) that Zayne was involved.

2. Dark Times
Set just after Episode III, DT looked at fugitives (Jedi and non) in the aftermath of the Clone Wars.

3. Rebellion
Set just before/during/after Episode IV, Rebellion told stories during the height of the war to bring down the Empire.

4. Legacy
Set 120 years after Episode VI, Legacy was the tale of Cade Skywalker and the Imperial remnants, as they battled the Sith Reborn, as led by Darth Krayt.

The minds at Dark Horse thought a cross-over would be interesting, and so they developed the Vector storyline.  Vector is the story of Celeste Morne (an Old Republic Jedi) and the Muur Talisman- an ancient Sith artifact that grants tremendous power (and longevity) to the bearer.  Celeste encounters the artifact (and its Sith ghost inhabitant) accidentally while with Zayne in KOTOR. Against her will, it latches on to her and gives her command of others (and tempts her to use the power for evil).  To protect the galaxy, she puts herself in a stasis box with it, and is abandoned.  Four thousand years later, she gets awoken by Darth Vader in DT, who has plans to use it for his own.  She fends him off but is abandoned on a remote world.  Celeste comes back into contact with the Skywalkers during Rebellion, and is granted a ship in which to flee.  She does so, and 100+ years later comes into contact with Cade & company in Legacy.  They eventually work out a way to free her from the Talisman and rid the galaxy of the threat, though it may not end well for all involved.

The concept of this cross-over series was great, and it was fun to see characters across centuries and story arcs come to together in a cohesive tale.  The execution wasn't quite as good- the art wasn't great, you needed to be familiar with each story arc to get maximum enjoyment, and the story felt forced in places to incorporate all the characters.  A noble attempt, in the end, and worthwhile for Star Wars die-hards, but could have been better for the layman.

Rating (concept): A
Rating (execution): B-