So first of all, I adore your art and your fics. Vacation Crashers has sent me spiraling back into both the Phandom and the Batfandom.
Not an actual Ask Per se, but something that crossed my mind. 
But I just scrolled down to some of your older posts and just realized. In a DP/DC crossover, Santa Clause is absolutely and with out question, Real. Like 100%. There is a Justice League episode where Martian Manhunter helps Santa with Christmas. And there is a Canon interaction between Santa and Darkside in the comics. Where he gives Darkside Coal for Christmas.
What I mean is Maddie is wrong in that universe. JACK IS RIGHT IN THIS CROSSOVER.
LOL Amg YOU'RE RIGHT XD
.........I can see Danny having such a grudge against Santa.. LOL Like you bastard-MY CHRISTMAS WAS SPENT WITH MY PARENTS ARGUING ABOUT YOU!? When realizing he's real..
Like I imagine the league thinking Danny be estatic because he's a young teen- to know Santa is real must be exciting mind blowing thing. And at first it seems like what they were expecting with Danny like... "You.. were.. real?!"
and then chaos when Danny lets out a whole 14+ years of pent frustration. : I
Then Danny just mops the rest of the trip.. extremely bitter. Because there is no way he can prove this to Mom.. cause he respects Santa's choices- and at this point his parents would assume Santa was a ghost anyways. So better safe than sorry... but still!
Danny just a grump ball.
Can see Santa does try and make up for it giving the ghost a present every year since he has been really good. =w= Danny ends up feeling mixed about it... because it doesn't solve his problems obviously.. it does make him feel validated in what he's doing.
Oh maybe Santa has been bringing Danny gifts for a while when he was young he just never knew because of How his parents argued.. assumed it was Jazz after he "accepted" there was no Santa.. though he had hoped.
Aww Thank you btw!