It's a very longstanding rumor, but the nighttime studio tour promised to be different from the day version, and this would probably be its biggest moniker. Add in 2015 and well, I don't see any reason why they wouldn't go through with this. Obviously Fast and the Furious will get the marketing push, but if Universal is smart they'll make this a year highlighting several new attractions: Springfield, F&F and the BTTF experience.
It's a smart move, I gotta say.