As per the source, Selecta Visión contacted Kodansha requesting the rights to simulcast Attack on Titan Season 2 in Spain during this Fall, but they were told by the Kodansha that Attack On Titan will not be airing on this year and that it has been rescheduled to some time in 2017, so Selecta Vision estimates that it will premiere during the anime season that starts in January 2017.
This claim of Attack on Titan Season 2 pushed back to 2017 is also supported by few facts that at this point of the year, no trailers, character designs, or any kind of announcements have been released promoting the Attack On Titan Season 2. As soon as we have more information we will let you know.