MNF is a double header so the Chiefs don't start until 9:15 p.m. but they're telling fans that they should be there 30 minutes early for some sort of surprise.
Josh Looney of KCChiefs.com gives us a hint that "it will be an experience and a tribute to Arrowhead...old and new."
So what could it be?
My guess is that it's some sort of musical act. It's Monday Night Football so the theme song -- by Hank Williams Jr. -- could be in play.
What's your guess as to what the surprise is? I think the key here is "tribute to Arrowhead...old and new."