Well, sadly there is no such Atari 2600 title. Though the talented Stargunner over on the AtariAge Forums did post this mock up of what the Box Art for the cartridge might have looked like.
I guess the market crash in 1983 and the lingering effects of it upon the industry up to 1985 when the Nintendo Entertainment System was released is actually what ensured that we never received an official Atari cart to tie-in to the film’s Holiday release.
So to all of you very talented people who visit the Retroist, do you think you can whip up a Santa Claus: The Movie game for the Atari 2600? Some people might think 27 years is too long a wait to find this cart under their tree this Christmas…but I’m not one of those people.