https://www.cnet.com/news/avengers-endgame-clip-gets-a-preview-at-disney-plus-event/

The scene opens with Nebula, saying Thanos spent a long time trying to perfect her and that, even disassembled, she wanted to please him. She would ask him where he'd go when he succeeded, and "his answer was always the same: to the garden."

"That's cute," War Machine answers. "Thanos has a retirement plan."