Details released include some major spoilers, so read on at your own risk.
- Deathstroke, also known as Slade in the 2005 Teen Titans series, will join the cast.
- Artemis will become his apprentice under the alias of Tigress, and will fight Nightwing at some point.
- Static will join the cast of young heroes.
- The Partner will be revealed to be a Reach agent, who in the comics are an enemy of Blue Beetle.
- A three-eyed creature speculated to be Despero will appear.
- Tula will make an appearance in the series, though it is unknown whether her scenes take place in 2016 or an earlier point in time.
- Lex Luthor and Mercy will also appear.
- The stolen children will be given superpowers.
- The Hall of Justice will be attacked by several tanks.
- We will see Tim Drake in civilian clothing.
- Zatanna will return.
For anyone interested, I've uploaded a series of screenshots to Photobucket. And again, none are permitted on-wiki, only for a closer viewing seeing as the trailer cuts between scenes very quickly.
Please remain civil. You should not harass other users or their views.