Look, I'm all for roasting sacred cows.
But Greta would be niche. Very niche indeed.
She's a minimum-makeup girl, so presumably she would actually put out in a relationship. But you'd have to stop halfway through because she's in tears over the polar bears again. And she'd expect you to sit with her and console her until she calms down.
Any studio that can make an adult film out of that, deserves to rule the world!