The newest series of Star Trek films was spearheaded by director J.J. Abrams and represents a continuity different than what was considered established canon. There have been multiple films in the series thus far.
Star Trek Edit
R2-D2 from the Star Wars franchise can be seen floating in a debris field.
Into Darkness Edit
R2-D2 makes another appearance in another debris field about an hour into the movie. He's found in roughly the same area of the screen as well, in the bottom left.