I can't think of any markets still open to them that aren't explicitly banned.
The way I see it, the injunction matters more than the main lawsuit.
As amazing, talented and successful as they are, they're still a newer group and young women at that. They can't afford to be out of the public eye for 3 years, and that's without having a 9 figure PR machine actively working to destroy their reputation. Especially being women, women who haven't had any opportunity to establish themselves outside of NewJeans, that's a career death sentence.
If they win the lawsuit (which has a low likelihood if they can't get past the injunction): then they will have been out of the public eye for 3 years, their brand deals will be gone and the industry will likely use lower interest to justify keeping an unofficial ban in place. Of course they'll still be somewhat successful but the risk is too much
If they want to compromise with Hybe and reach a settlement: they'd be walking into it at severe disadvantage
If they lose: their image in Korea is irreparably damaged. They'll definitely still be blacklisted and brands have no incentive to come near them. It's going to be a lot harder to find investors that will cover that debt, even if they'll still be successful
Obviously, I hate Hybe and think they shoulder a majority of the responsibility for how this whole shit show has played out, and I'm not stupid enough to think things will significantly improve if they go back, but it's survivable. They should have waited a year before trying this and not made it so obvious they were out to terminate their contracts. They were proactive when they should have been reactive