Can anyone confirm if bringing back good nebula and kamaria and Lyla are possible? I saw a YouTube link saying a bringing back Kamaria ending but is it a one use thing? If it's not is Nebula good if she comes back?
It's only a one-use thing. You've got to choose between the options given, and you can only choose one.
As for your Nebula question, I'm not sure. I haven't seen what happens in that scenario. I'd assume she's good if you repaired her relationship with Gamora.
She's the good Nebula again. She's even back to her normal self minus the cybernetics.
Yes they are