https://www.youtube.com/watch?v=oLmDgzFwLiA
I am not sure if this is the official release or not. But who cares!?
Spoilers
Bruce Wayne just mentions your old friends the titans
First we see
Jason.Todd
Toward end we see
Dick Grayson
Donna Troy
Garth Aqualad/Tempest
Hawk
Dove
Is that a flashback
Then
Raven asks if her group is
Titans 2.0
Dick Answers Titans New Generation
See
Starfire
Raven
Beast Boy
Then
Superboy and Krypto (name on dog collar)
then Ravenger?
Then Deathstroke
Maybe Jericho is in there but clips go too fast