Curate, connect, and discover
I think a lot about Jason missing his adolescence and the dismorphia he must feel waking up in a body twice his size all of a sudden.
But recently I've been thinking about the loss Bruce and Dick must feel for missing that portion of his life that they were likely looking forward to. To need to look up at their baby boy/brother all of a sudden when your last memory of him you could carry him on your hip. This man has a whole personality, memories, experiences they don't know about when just yesterday they knew everything about him.
The idea of Jason not having any scars after the Lazarus pit is also angst central usually. Jason shows up and says "I'm not the kid you knew". They look over him and the small burn on his wrist from when him and Dick tried to cook? Gone. The scar on his back from falling in training that led to him and Bruce taking a PT break together? Nowhere to be seen.
When they work together they slot into his right out of habit since he's had more of an opening there since he broke his arm but... That injury doesn't exist anymore so he moves out of that position. And they're left with that small reminder that he's grown now. He's still Jason but they don't know him like they used to anymore.