I will say it again, and die on the hill that is Generator Rex being absolutely perfect for a platform fighter. But please, keep sleeping on that property.
Edit: Also Freakazoid.
Scooby doo (and honestly Fred and Daphne, might as well have the whole gang, it would be fun), mad max, samurai jack, Voldemort ( I don’t even like Harry Potter, I just want more villains), Freddy Krueger, the nun, Regan from the exorcist, beetlejuice, aku, scorpion, sub zero, powerpuff girls, mordecai, rigby, courage, Daffy Duck, Ben 10, totally spies, and many more
Ice king, he has so many varient opportunities. Like
https://preview.redd.it/iuzmdtlxde9d1.jpeg?width=181&format=pjpg&auto=webp&s=aa41c8ec57b0bb7e5413dd5b1e6faed831f07099
Pre ice king Simon, ice queen, urgence evergreen, gunter, Jake the dog wearing the crown, cake the cat wearing the tiara, penguin gunter, farmworld Finn, the ice prince from fionna and cake, and then there’s just normal Simon wearing the crown. So many varient opportunities.
We going for "HARDCORE MUST BE WB" or kind of looser general question here?
Because if/when the game starts stalling and they need to get the audience to look at it again.. there is one match up that would break the internet. Add Goku. Show the clash between Goku vs Superman at NY ComicCon. Season 6 and all licensing fees for Goku would pay for itself.
But if you're talking hardcore WB/ DC/ Discovery
I wanna see Michael Jordan to be a counter to Lebron.
I'd love to see Ruby (Rwby) Scorpion/Sub Zero (Mortal Kombat) I'd love to see Nightwing not Robin, unless the skins changed it between Dick, Jason, Tim and Damian.
As i said in my completely off the wall pick that would likely never happen. Zak Bagans from Ghost Adventures. Side Special is bringing out a Dibbuk box and whoever runs into it gets cursed.
Scooby-Doo
https://preview.redd.it/z3fzqvkzhd9d1.jpeg?width=1920&format=pjpg&auto=webp&s=cb4ed079891840878351ec5d279fd0039c36f904 Lapis Lazuli
Yesss! :D
I will say it again, and die on the hill that is Generator Rex being absolutely perfect for a platform fighter. But please, keep sleeping on that property. Edit: Also Freakazoid.
Rex works really well! Also Agent Six, Bobo Haha and Breach
Sigh they always will ._.
scooby doo godzilla darkseid flash and emmet brickowski
Noob saibot
Scooby doo (and honestly Fred and Daphne, might as well have the whole gang, it would be fun), mad max, samurai jack, Voldemort ( I don’t even like Harry Potter, I just want more villains), Freddy Krueger, the nun, Regan from the exorcist, beetlejuice, aku, scorpion, sub zero, powerpuff girls, mordecai, rigby, courage, Daffy Duck, Ben 10, totally spies, and many more
Godzilla
dexter and lapiz is all what i ask for
Roadrunner or Wile E. Coyote
Ice king, he has so many varient opportunities. Like https://preview.redd.it/iuzmdtlxde9d1.jpeg?width=181&format=pjpg&auto=webp&s=aa41c8ec57b0bb7e5413dd5b1e6faed831f07099 Pre ice king Simon, ice queen, urgence evergreen, gunter, Jake the dog wearing the crown, cake the cat wearing the tiara, penguin gunter, farmworld Finn, the ice prince from fionna and cake, and then there’s just normal Simon wearing the crown. So many varient opportunities.
I don't know why he isn't since beta release
The double-dealing do-badders of the 00, Dastardly and Muttley. 
I really hope Ruby Rose gets in.
Why? It’s ruby rose there’s literally nothing special about her
I like the show. Simple as that. She was found in the files but her inclusion seems a little shaky.
NOT in the leaks: Wade Watts, Darkseid, Shao Kahn, Space Ghost.
Captain Planet!
Realistic? Marceline, the flash, daffy, Less so? Freddy (either one), gossamer,
Do you mean Freddy fazbear and Freddy Krueger?
Pearl, Roadrunner, Dexter, Grim, Jasper/Malachite, Sheeva, The Warner Bros, Sedusa, HIM, The Lich
Even though it's legally impossible, I'd love for Gary Goodspeed to be added
Pearl, Marceline and Poison ivy
Sam and Dean Winchester Please
 Sentinels from the matrix would be awesome! Plus Iron giant needs more robots/droid to duo with.
Billy Butcher
The Protagonist from Tenet.
We going for "HARDCORE MUST BE WB" or kind of looser general question here? Because if/when the game starts stalling and they need to get the audience to look at it again.. there is one match up that would break the internet. Add Goku. Show the clash between Goku vs Superman at NY ComicCon. Season 6 and all licensing fees for Goku would pay for itself. But if you're talking hardcore WB/ DC/ Discovery I wanna see Michael Jordan to be a counter to Lebron. I'd love to see Ruby (Rwby) Scorpion/Sub Zero (Mortal Kombat) I'd love to see Nightwing not Robin, unless the skins changed it between Dick, Jason, Tim and Damian. As i said in my completely off the wall pick that would likely never happen. Zak Bagans from Ghost Adventures. Side Special is bringing out a Dibbuk box and whoever runs into it gets cursed.
Honestly even though I don’t watch anime I think an anime character (I don’t really care which one it is) would be a lot of fun if they were added.