Yes! Except it wasn’t taken prisoner, it was actually an imperial droid there to find the plans.. Which makes its appearance on Yavin before the capture of the Tantive IV quite perplexing.. Unless this was just another R4 unit with similar paint job..

Hi, Jason. Good catch, but there’s another droid in this trailer worth commenting on, an alliance astro droid with very similar markings to the imperial droid R4-M9, who was used by Darth Vader and company during the capture of the Tantive IV Rebel Blockade Runner in A New Hope. He appears in the lower left hand side…