This would be a total pipe dream, I realize, but why not.
Two seasons, three packs of three characters (one hero, one heroine, one villain), two new premier skins with each pack. I think Martian Manhunter and Zatanna should be in, but I'm following the NRS rule of not repeating DLC.
SEASON ONE, PACK ONE
Red Hood
Starfire
Black Manta
Premier Skin: Red Arrow (Green Arrow)
Premier Skin: Artemis (Wonder Woman)
SEASON ONE, PACK TWO
John Constantine
Mera
Circe
Premier Skin: Midnighter (Batman)
Premier Skin: Apollo (Superman)
SEASON ONE, PACK THREE
Animal Man
Raven
Deathstroke
Premier Skin: Donna Troy (Wonder Woman)
Premier Skin: Aqualad (Aquaman)
SEASON TWO, PACK ONE
Static
Enchantress
Star Sapphire
Premier Skin: Silver Banshee (Black Canary)
Premier Skin: Ra's al Ghul (Robin)
SEASON TWO, PACK TWO
Booster Gold
Batwoman
Sinestro
Premier Skin: The Joker's Daughter (Harley Quinn)
Premier Skin: Superboy (Superman)
SEASON TWO, PACK THREE
The Atom
Hawkgirl
Killer Frost
Premier Skin: Black Orchid (Poison Ivy)
Premier Skin: El Diablo (Firestorm)