I think people are being fooled with the nightmare batman storyline. it's not a dream.
The flying things picking up the soldiers are para-demons. I think we will see boom-tubes towards the end of the movie and the intro to...
and the justice league in which the guardians will assign three rings to sector earth. 
Exactly this!!
So many fanboys are ranting "they're showing the movie in the trailer! DC is spoiling everything!! They showed Doomsday!!"
Doomsday will be the primary baddie in this flick, but he isn't the big reveal. He's the big fight for the Trinity.
The Parademons in the desert scene with Bats are the key.....those things swarmed exactly like Parademons from comics and animated movies.
The big reveal in this will be Darkseid.....which I love!! The Thanos of DC!!
Remember this film will also reveal Aquaman (Jason Momoa) and Cyborg (don't remember actor)....the Justice League is being setup.
The trailer merely revealed the Trinity in Superman, Batman and Wonder Woman (who looked awesome by the way!).
I agree that with the introduction of Darkseid and Apokolips that the Lantern Corps will be revealed in the next movie as they police the universe and are well aware of Apokolips. How and why they introduce Apokolips and Darkseid is a mystery, but clearly alien life exists (via Superman). Perhaps they'll establish a longstanding Apokoliptian rivalry with now destroyed Krypton and Darkseid's discovery of Jor-El's offspring on Earth. Would make a reason for the Lantern Corp to show up and make Hal Jordan of Earth a new GL to police Earth and surrounding universe sector.
Maybe we get a taste of Darkseid's omega beams? Maybe baddies from Apokolips come to claim Doomsday?
Doomsday will be the third act and the film with most likely close with a boomtube and Desaad and/or Granny Goodness coming and possible a glimpse of Darkseid like Avengers did with Thanos.
Man, I hope those are Parademons!!
