So, while watching the amazing Batman V Superman: Dawn of Justice trailer in all it's glory, which you can view below, that appeared at Comic-Con International, I noticed something in it that's connected to Man of Steel that may or may not be intended.
During the fight between Superman and General Zod
There's a sign in the back that states "KEEP CALM AND CALL BATMAN". Well, the new Dawn of Justice trailer puts that to heart.
As you can see above, outside that exact same building, is Bruce Wayne, aka Batman, using his phone to (maybe?) call Alfred. Either that or it's the other way around and Alfred is calling him, but we won't know that until the movie is out.