But if it's concerning Big Bang, you know it's gotta be something good! Big Bang allude to their tenth anniversary, which falls exactly on August 19, 2016.
It could be that Big Bang's got a big thing planned for that date....or not, knowing YG. But I don't think YG would flout its biggest boy group with a mere teaser image, so we'll just have to patiently wait to see what's really up.
Meanwhile, feel free to concoct your own theories-crazy or not!