A .cbz file is an archive (renameable to .zip ) containing sequential image files (usually JPEG or PNG) of the comic pages.
There are two primary "Omnibus" collections that this file likely refers to, depending on the creator and timeline: Star Wars Omnibus - Darth Vader.cbz
Vader hunting down surviving Jedi (including Master Jocasta Nu), the construction of Fortress Vader on Mustafar, and obtaining his signature red lightsaber. Star Wars Omnibus - Darth Vader.cbz
Focus: Set between A New Hope and The Empire Strikes Back . Star Wars Omnibus - Darth Vader.cbz
Collects issues #1–25 and Darth Vader Annual #2 .
The introduction of Doctor Aphra, Vader's secret investigation into the pilot who destroyed the Death Star, and his relationship with Jabba the Hutt. Technical File Details (.cbz)