I mean, considering if you look at it in the light of a different story, the near (actual, factual) homicidal level of bond and love the Addams have for each other, the idea that they’re all adopted, the way that Bruce is often portrayed as a bit of an aloof, smarmy smarm in private, the possibility that young Bruce might not be wholly appreciative of his extended family’s eccentricities, of which his parents are the mildest of the bunch, the idea that those two parents are (distantly) Addams’ and get gunned down, well.
[Gomez]: I came, I came as soon as I heard
[Bruce]: I…I told you never to come back, I said, I said you were weird
[Gomez]: Please, my boy, to compliment me when you are so wracked with grief. *clutching hug* Dear Thomas, dear Martha, so full of life…
[Bruce]: *extricating* They….they fell in front of me…while he laughed…with mother’s pearls…
[Gomez]: The fiend! This dishonor cannot stand!
[Bruce]: And I felt….I felt it well up inside me, a black blood welling up…
[Gomez]: Yes, dear boy…
[Bruce]: I….will be vengeance….
[Gomez]: Yes….
[Bruce]: I…I will be the night!
[Gomez]: Yes!
[Bruce]: I….I am an Addams!
[Gomez]: YES!
[Bruce]: I. AM. BATMAN. *lightning, thunder*
[Gomez]: YES, YES!!! My boy, the rivers will run red with wonderful blood!
[Alfred]: *sigh* I’ll put the tea on and grab the foils then, shall I, sirs?