It isn't April 1st, the combine has simply realised that Star Wars was too complicated a setting to create a game in and instead a switch to the popular farmville style of game is the best way to progress the game and attract a larger playerbase from the horde of facebook users.
I think the art team let me down a little because the new image for a Gozanti isn't really THAT different. It even has the same functions: big, slow, can haul a lot (farmhands or stuff), and it backfires a lot. ;)
I would like to point out that the Art team was only responsible for the header and login pages - the Asims made all entity images. Therefore, I take no responsibility for the quality or assignment of them.