Deathstroke- It could generate more success if he started out in a suicide squad movie.
Swamp thing- There already was one but a reboot with today's special effects could improve.
Red hood- Would be difficult to explain the back story.
Nightwing- Same as Red Hood but more likely to be made
Hawkman- Already announced, It could be similar to Legion
Green arrow- If it's based off Year One then it has a bigger chance.
Captain marvel_ With Black Adam It can not.
Lobo- They already talked about making one and and said that it might have a Pg-13 rating so if they decide to keep that then it will probably fail.
Martian manhunter- It would be difficult to adapt but it could work.
Flash- I'm not sure but the Film will appeal to a lot of people.
Wonder woman- Same as Flash.
Aquaman- Will be met with confusion at first but it can work with the right Vision.
Booster gold- I don't think he has enough material for his own movie.
Blue beetle- It should stay with a Live-action show.