This movie was kind of meh, but the one scene...
that really got to me was Batman's hallucination, when he sees what Damian would become if he didn't start acting like a father towards him and actually show him affection, and Batman!Damian starts shooting him, but Bruce powers through it, and embraces him and asks for his forgiveness.
I can't help it, I'm a sucker for stuff like that.
(And apparently Damian's costume during that sequence is a reference to one of the comics?)