For Jon this was like a blow to his face. a bucket of cold water that froze his bones.
You was his sibling. Not in this universe, but in his. His lovely sibling who always were so sweet and wonderful with him, who just died a few months before he gets to this adventure between universes.
He knows you, but you don't knows him because he didn't even born in this universe, the universe where Lois Lane, your mother, died because of the Joker when she was pregnant.
The universe where your father, superman, who was supposed to be the symbol of peace and hope, had become a dictator.
Where you was against your father and becomes part of the resistance to stop him.
You looked so different to him, his version of you looked so bright and happy even when you... Well, died. But here, you looked tired, lonely and sad.
God, it hurts him looking at you, not only because he just loose you a few months ago, but also because where he finally see you again, you looked so bad.
He knows that you technically wasn't his sibling, but he couldn't help but hug you, feeling you tense at his action.
“Sorry, sorry... I-I know that you're like, freak out because you're seeing another super person who casually looks like your dad and also is hugging you like I know you... But, I actually think I kinda know you... Well, no you, a version of yours of my universe...”
Of course he would start rambling shakily while clinging to you like his life depended on it. For him that's how it was.
“I– You was my sibling in my home... With my mom and my dad and Conner and– and... You died and you just look and speak and your heartbeat is just like... Like my sibling's... Sorry... I just...”
Sobbing murmurs escaped the young super, trying not to cry because technically, he wasn't your brother and you weren't his sibling.
But right now, he needed this. And Jon knows that maybe, you also did. He can tell it for the way you patted his head.
God, he needed it. He needed this.