The Xbox One S might have its own mini Master Chief hidden inside of it, but the Xbox One X is looking to outdo that 4K machine in every way possible – even with easter eggs.
Hidden inside the beefed-up Xbox One X is a mini Master Chief riding a scorpion. It's not a scorpion from Halo, but an actual scorpion. This is a call back to the Xbox One X's in development name, Project Scorpio. Now, you could open up your Xbox One X and see it for yourself when the console releases in November, but you should know it will void your warranty if you do.
You might want to settle for videos or pictures for now. You can see it for yourself at around 10:50 in the video below: