Fun Thread.
Roster of 30+ 2 Unlockables:
Superman
Wonder Woman
Batman
Nightwing
Green Lantern (John Stewart)
Green Lantern (Hal Jordan)
Flash (Barry/Wally alts. already selectable)
Aquaman
Cyborg
Green Arrow
Black Canary
Vixen
Plastic Man
Zatanna
Hawkgirl/man (Same character with slight variations)
Katana
Firestorm (Rusch/Raymond alts. already selectable)
Static
Braniac
Cheetah
Joker
Harley Quinn
Bane
Sinestro
Zoom
Black Manta
Black Adam
Amazo
Killer Frost
Poison Ivy
Unlockable:
Martian Manhunter
Darkseid
12 DLC Characters:
Powergirl DCL (Supergirl alts.)
Robin DLC (all Robin alts.)
Batgirl DLC (all BG alts.)
Green Lantern Full Character DLC (Guy, Kyle, Jessica)
Mera Full Character DLC
Outsiders Full Character DLC (Black Lightning and Metamorpho plus costumes for Katana)
Titans Full Character DLC (Raven, Starfire, Beast Boy)
This gives us a roster of 44. Pretty good size for a fighting game. I'd want a bunch of costumes as well, but that goes without saying. Like an Earth 2/3 set, a Justice Incarnate set + whatever other multiversity costumes people want.