It's not that early. Though you can never tell when leaks will happen. We started getting concept art/costumes for The Force Awakens in summer of 2014 almost 1.5 years prior to the films release. And that was when TFA was still in the middle of production. It was September/October of 2014 where we get a big cluster of concept art, and sometime around there the first promo shot of Kylo Ren leaked. (Funny looking back many thought it was a fake).
Hard to tell with the security surrounding this, they did take some extra precautions that they did not take before, and the film is much farther along than TFA was when we started having leaks.