Feels like after he leaves...his former teammates will all die on the next mission. And he’ll possibly get stuck with an accusation of sabotage carried out before he left.
disclaimer: the above is not a spoiler. I have not read future works. This is pure conjecture. Again, not a spoiler.
Santa happened to have a sexy Santa suit on his sleigh. It was a coincidence. In no way was it going to be used for some perverted deli-health play when Santa was done with Santa’s job.