Apocalypse had no idea what Nebula had originally looked like. Of course, he couldn't call her ugly, so he said, "Not at all. You look pretty cool like this, too."
Given Gamora's and Nebula's relationship with Thanos, their betrayal would certainly bring even more pursuers down on them.
Without sufficient strength, they would indeed be in grave danger.
Although Nebula usually fought with just her hands and feet, her body actually contained an enormous amount of energy.
In the original plot of Guardians of the Galaxy Vol. 2, the Golden Race's ships had chased them down and attacked.
Rocket Raccoon's ship had been hopelessly outnumbered and was running out of power. Disaster had seemed imminent.
Then Nebula had stepped in.
She had connected herself to the ship's power system, letting it draw a tremendous amount of energy from her body and instantly restoring it to full power.
A single laser barrage had wiped out every golden ship.
High Priestess Ayesha, countless light-years away, had been left roaring in impotent fury.
Judging by her strength in the original story, Nebula could even be considered something of a hidden miniboss among the Guardians of the Galaxy.
However, having so much energy drained from her all at once was extremely painful, so she rarely resorted to it.
Hearing that Apocalypse didn't mind, Nebula relaxed and said softly, "That's good."
Of everyone present, Rocket Raccoon knew the most about technology.
After repeated checks, he found a tiny, well-hidden encrypted chip. Removing it wasn't difficult.
As the chip was removed, something happened elsewhere.
In an unknown region of space countless light-years away, a signal-lost notification appeared on a holographic screen.
Thanos stared at the last image transmitted by Nebula, neither sorrowful nor angry. His enormous purple face remained motionless.
Finally, he said, "Ebony Maw,