Star Wars #15 (2nd print) and Star Wars: Darth Vader #16 (2nd print)

The Vader Down event sold very well for Marvel increasing the number of copies sold for the tie-in issues.  In fact, the two Star Wars and three Darth Vader tie-in issues went back to print.  Usually, after an event, subsequent issues see a decrease in sales.  The issues immediately after the Vader Down story arc ended, Star Wars #15 and Darth Vader #16, went back to print as well.  From the numbers published by Comichron, it appears retailers scaled back the number of issues ordered by too much and these issues were under-ordered.

Star Wars #15a - Marvel Comics, U.S. (January 2016)

Star Wars #15 has another tale of Obi-Wan Kenobi on Tatooine.  The standard cover shows Obi-Wan.

Star Wars #15e - Marvel Comics, U.S. (January 2016)

The 2nd print cover is a variant of the same art, except the background has now been replaced with a star field.  Many of the 2nd prints from Marvel have used a star field background.

Star Wars: Darth Vader #16a - Marvel Comics, U.S. (February 2016)

Darth Vader #16 jumps back into the narrative by returning Vader to Shu-Torun to quell a rebellion.  The cover is a nice piece showing Darth Vader's head.  His polished armor is emitting a lot of shine.

Star Wars: Darth Vader #16b - Marvel Comics, U.S. (February 2016)

The 2nd print cover is the same artwork, except Darth Vader is lit by red light.