While I didn't get to play it, I loved the idea of Christmas trees in Attnam for Christmas. We already have the free banana as well. I think it would be amusing if we had a Christmas release each year with a different gag. (To avoid Christmas bloat we should probably remove old Christmas gags each year as well...)
Also, since relatively few people are actually going to be playing IVAN on Christmas itself, we might want to make the gag last from 3 days before until 3 days after.
Possible gags include Santa hats for enemies (and PCs), candy canes as weapons, elves in New Attnam, Santa replacing Huang Ming Pong, etc.........
"Put more stuff in the... thing where... more stuff goes in."