Superman Batman Flash Aquaman Supergirl Grodd Atrocitus Wonder Woman Blue Beetle Harley Quinn Deadshot Robin Brainiac Bane Poison Ivy Green Lantern Darkseid Green Arrow Cyborg Joker Catwoman Black Adam Captain Cold Doctor Fate Swamp Thing Firestorm Black Canary Scarecrow Cheetah Freeze

Really wondering if Spawn, Darksied will be DLC along side the MK Guest Character (Sub-Zero)

This is what I think the roster is going to be as well as the DLC, however the alt skins are just purely what I'd wish to see given the characters on the list just off the top of my head, not necessarily all of what I am expecting.

Base Roster
01 Batman / Owlman / Terry McGinnis Batman
02 Blue Beetle
03 Flash / Wally West Flash / Reverse Flash / Zoom
04 Harley Quinn
05 Superman / Bizarro / Ultraman
06 Supergirl / Power Girl
07 Wonder Woman
08 Deadshot
09 Gorilla Grodd
10 Aquaman
11 Atrocitus
12 Bane
13 Poison Ivy
14 Robin / Tim Drake Robin
15 Captain Cold / Mister Freeze
16 Black Canary
17 Doctor Fate
18 Green Lantern / John Stewart GL / Jessica Cruz GL
19 The Joker
20 Catwoman
21 Swamp Thing
22 Cyborg
23 Cheetah
24 Firestorm
25 Scarecrow
26 Green Arrow / Red Arrow
27 Black Adam / Shazam
28 Parasite
29 Martian Manhunter
30 Brainiac
31 Darkseid (Pre-Order)

DLC
32 Red Hood / Arkham Knight
33 Constantine
34 Black Manta
35 Katana
36 Starfire
37 Hawkman / Hawkgirl
38 Doctor Manhattan
39 Sub-Zero
40 Spawn

Man, your is list is damn near perfect. The only changes I have is that Swamp Thing will be DLC instead of Katana. Hellboy will be DLC instead of Constantine and Batgirl will be in the main roster.

1. Batman
2. Superman
3. Wonder Woman
4. Blue Beetle
5. Harley
6. Flash
7. Aquaman
8. Grodd
9. Atrocitus
10. Green Lantern
11. Deadshot
12. Supergirl
13. Robin
14. Bane
15. Poison Ivy
16. Doctor Fate
17. Captain Cold
18. Cheetah
19. Martian Manhunter
20. Static Shock
21. Braniac
22. Black Canary
23. Cyborg
24. Black Adam
25. Firestorm
26. Vixen
27. The Atom
28. Killer Croc
29. Green Arrow
30. Katana
31. Darkseid

DLC

32. Sub Zero
33. Spawn
34. Booster Gold
35. Starfire - Titans skin pack (Wally Flash, Garth Aquaman, Red Arrow Green Arrow)
36. Captain Atom
37. Hawkman - Legends Pack (White Canary, Cold, firestorm with the casts voicing)
38. Vibe
39. Red Hood - Outlaws Pack ( Bizzaro, Artemis , Arsenal)
40. Animal Man