Every day we see rumors of Teen Wolf popping up.
Jake T. Austin indeed was seen close to the set of Teen Wolf, but nothing has been confirmed. And it might just have been for his movie "The Valley". While Ross Lynch, well we don't know if he was on set or not. But nothing has been confirmed yet.
Pete Ploszek is the only confirmed newcomer this season. He'll play a character with the name Garrett Douglas. He'll be a teacher at the high school.
Tyler Posey, Holland Roden, Dylan Sprayberry and Shelley Hennig, all 4 return as the main cast. While Dylan O'Brien is still recovering, he'll be fine, but fine on time? Teen Wolf is sure he'll make it back on time to also be a part of the main cast again. He and Tyler Posey did every episode of teen wolf so far. While Ryan Kelley, Cody Christian, Victoria Moroles and Khylin Rhambo all have been rumored to be a part of the main cast next year, nothing has been confirmed. While Arden Cho won't be in the first 3 episodes and maybe not even the fourth and whole 6A. So she is probably not returning as a main. But recurring actress.
While Chris Argent (JR Bourne) will only be in Season 6A and maybe 1 or 2 Episodes of 6B. JR Bourne will be busy filming prototype when Teen Wolf starts filming 6B. Isaac Lahey is set to return as Isaac Argent. Daniel Sharman is still in LA, and no one knows what he's doing. So he might be returning to Teen Wolf in season 6. Some say he's expected to return in episode 10.
Deucalion (Gideon Emery) is going to return in episode 1 of season 6.
While Peter Hale (Ian Bohen) might pop up in season 6B.
Tyler Hoechlin won't be returning to Teen Wolf in season 6, or maybe as a guest star for 1 episode, maybe 2.
While Charlie Carver might reprise his role as Ethan in season 6.