This planet looks to be the setting of a major confrontation between Team Iron Man and Thanos (Josh Brolin).
The Mad Titan smacks the crap out on Iron Man and Spider-Man in the orange wasteland, and Tony Stark looks absolutely shaken in what looks like the same setting.
The opening shot of the trailer is an unnamed orange planet.
Thanos has the Space Stone at this point, so it’s possible that he teleported everyone there from Earth.