Image Credit: Lucasfilm
Yes, as may well have guessed, that is indeed Yavin 4 in all those trailers and posters for Rogue One. It makes perfect sense, too, if you think about it. Before A New Hope, The Alliance to Restore the Republic utilized the Great Temple of Massassi during the war as a base of operations against the Empire. The rebel force that destroyed the Death Star was launched from Yavin 4, and then there was a medal ceremony held at the end of A New Hope in that very same temple. So yes, Star Wars fans, Yavin 4 is yet another returning Star Wars character in Rogue One!