I feel bad for OP, no one even answered his question. Here's my personal ranking, i'll be happy to explain my reasoning if asked.
1. Aquaman- Auto footsies, trident rush, trait, etc.
2. Atrocitus- Nasty corner combos, ridiculous footsies, tons of utility
3. Bane- Heavily slept on imo. With proper trait management he can't even get hit.
4. Batman- Best trait in the game. Can't anti air him.
5. Black Adam- Great damage, great pressure, but has no real wakeup.
6. Blue Beetle- Aerial mobility really helps him. His zoning is great too. He's just really boring.
7. Canary- She's got a ton of mixup potential.
8. Captain Cold- I know i've hated on him in the past but with proper setup he can be really great.
9. Catwoman- Really solid fundamentals, great pressure
10. Cheetah- Mobility is great, best F3 in the game, solid mixups
11. Cyborg- Heavily slept on. Great zoning but really good pressure too.
12. Darkseid- Relies a lot on gimmicks right now but his trait leads to a lot of great stuff.
13. Doctor Fate- You've got to play almost perfectly with him but he has a lot of potential.
14. Deadshot- Overrated but still good. Very straight forward character.
15. Flash- Struggles with zoning for sure but his trait still has some great uses.
16. Firestorm- Pretty good traps and zoning, but not as good as some of the top tiers.
17. Green Arrow- Solid zoning, decent footsies.
18. Green Lantern- Not as good as he was in IJ1 but his zoning and footsies are alright.
19. Grodd- Stampede cancels are hard to do but when perfected he has some great pressure.
20. Harley Quinn- Hella overrated. Her zoning isn't that good and her pressure's meh.
21. Poison Ivy- Again pretty overrated, once you learn the trait pattern she's easy to deal with.
22. Joker- Has some good stuff but has a lot of bad matchups.
23. Red Hood- Still early so this could change but I think he's really gimmicky.
24. Robin- Gimmicks abound
25. Scarecrow- Super overrated. Whiteboi's just an amazing player.
26. Superman- Most overrated character in the game. Strategy is the same every time.
27. Supergirl- No damage, no real footsies. Nothing.
28. Swamp Thing- Lol
29. Wonder woman- Double lol.
Let me know if you have any questions.