Going through my story notes, and oops I kind of like this phrasing better for that post:
She likely modified Darla partially to carjack her, for when/if her friends decided that she shouldn't be going after Hordak.
This sort of nukes the sad AU idea with Jokes, but the idea of Entrapta & Hordak just carjacking a first one’s ship and running for the hills is kind of wholesome? Just boot out Adora et al in a life boat or something and enjoy life on the far sides of the universe.
Although, it’s still sad considering Hordak has tech/chips/??? whatever in him that Prime can just zero in on and summon him with. Wait, so if Entrapta didn’t come back with them to Etheria, would... would Adora die? Catra would still be chipped. Everyone would be. Would Prime win? Oh no.
No, if it was me writing it, Hordak’d get snared again and she’d have to come back to Etheria to Finish Things, and at the end of things, we’d get a more gray-morality coded Entrapta who’s still clearly villain-material (do not steal my Lab Partner, or you will suffer the consequences!)
Could see them stupidly trying to lock both of them up then, but like, they just keep getting out somehow? Hordak won’t stand to see Entrapta enchained and Entrapta can just slip out of any restraint and easily make her way to Hordak. Eventually Bow and Adora just toss them into the Crypto Castle and shout STAY PUT! And they do, thankfully.