I remember visiting this website once...
It was called Justice League vs. Teen Titans Cast Revealed
Here's some stuff I remembered seeing:
First Image and Cast for Justice League vs. Teen Titans Animated Movie
Justice League vs. Teen Titans cast revealed
The first image for Warner Bros. Home Entertainment’s Justice League vs. Teen Titans has been revealed by TV Insider along with the cast, which includes Jon Bernthal (Frank Castle in Marvel’s Daredevil) as the demon Trigon, Taissa Farmiga (American Horror Story) as his daughter, the superhero Raven, Jake T. Austin as Blue Beetle, Brandon Soo Hoo as Beast Boy, and Kari Wahlgren as Starfire.
Justice League vs. Teen Titans will also see the return of several other voice actors who have appeared in other DC fare, including Jason O’Mara as Batman, Jerry O’Connell as Superman, Rosario Dawson as Wonder Woman, Christopher Gorham as the Flash, Shemar Moore as Cyborg, Sean Maher as Nightwing, and Stuart Allan as Robin.
Set to debut this spring on Blu-ray and DVD, Justice League vs. Teen Titans sees Robin forced to work with the Titans after “his volatile behavior botches a Justice League mission.” Once involved with the group, Trigon will possess the members of the Justice League, forcing the young heroes to fight them.
A preview for the film is set to debut next week with the official release of Batman: Bad Blood.