This are the cast I think that could play Tyreese, Manuel, Horold, John, Martinez and Alice

Tyreese = Chad Coleman

Manuel = Sergio Peris Mencheta

Harold = Unkown

Axel = Lew Temple

John = Jason Statham

Alice = Summer Glau

Martinez = Jared Padalecki

Tell me what do you think of the new characters cast AGAIN I KNOW IT MAY NEVER HAPPEN BUT IT´S A FUN TOPIC TO TALK ABOUT. DON´T CRITIC ME