Season nine (Spoilers): Clark Kent takes his superhero persona into obsessive territory when he leaves behind those he cares for so that he can focus solely on Jor-El's training. To accomplish this, Clark wears a new dark costume that sports his family crest on the chest. The theme of the season is about Clark finally embracing his alien heritage, while also being his darkest hour thus far. A result of this is Clark's relationship with Chloe and Oliver suffered this ninth season. This season also saw the introduction of many more DC comic book characters, including multiple episode appearances for the Justice Society of America, villain Metallo, and villainous Agent from Checkmate; Amanda Waller and Maxwell Lord.
Many thanks to Wikipedia link below.
LEEE777 - Well the DVD art does look brilliant and fingers crossed we get to see the red and blue next season, oh and much more DC universe cameos plus heh heh spin offs!