Welcome to Lothal -- don't mind the huge Imperial presence casting a gigantic shadow over half the city! The Star Wars Tumblr page has unveiled this piece of concept art by Andre Kirk for the upcoming Disney XD animated series Star Wars Rebels.
The series takes place between Star Wars Episode III: Revenge of the Sith and Star Wars Episode VI: A New Hope, at "a time where the Empire is securing its grip on the galaxy and hunting down the last of the Jedi Knights as a fledgling rebellion against the Empire is taking shape."
Aside from those details we don't know too much about the series, beyond that the main antagonist is a tough-looking Sith Lord called The Inquisitor. Star Wars Rebels will premiere in 2014 on Disney XD.