New Pictures of Henry Cavill, possibly some abandoned buildings (Gotham?), and a few boats (Aquaman?). Bananadoc and Tim Malin both seem to think some major filming is about to go done at this location.
And most importantly of all the FUN BUS!
BATMAN v SUPERMAN: DAWN OF JUSTICE - Zack Snyder will direct. It's written by Chris Terrio, from a screenplay by David S. Goyer. The film stars: Henry Cavill as Superman/Clark Kent and Ben Affleck as Batman/Bruce Wayne. The cast also includes: Amy Adams as Lois Lane, Laurence Fishburne as Perry White, Diane Lane as Ma Kent, Jesse Eisenberg as Lex Luthor, Ray Fisher as Cyborg and Gal Gadot as Wonder Woman/Diana Prince. Will arrive in theaters March 25th, 2016.
https://twitter.com/Bananadoc and https://twitter.com/HenryCavillNews are my two other sources