When Santa returns, you can see an elf erasing the "days incident free" board's number. It factors out to 28 years incident free, aka the year after he puts on the suit.
When Simon Choksi searches for answers online about whether Santa Claus actually exists or not, he shows his daughter, Grace, a clip of Santa walking in the woods looking back over his right shoulder. The video is from a website called Clauspiracies.com and is titled "Real footage of Santa Claus". This is a parody of the famous Patterson-Gimlin Film (1967) which allegedly shows real footage of Bigfoot.
The book of potential Santas the first name seen is Michael Buble' followed by Simon Chokski
The company that Simon pitches the drones to is A LEECH company. Their motto is "investment is in our blood"