I keep hearing this is the biggest game in Detroit sports history.
It seems like a case of recency bias. I get that the NFL is the most popular game in town in most places, but that wasn't always the case. I'm no expert on Detroit sports history, but I remember several NBA championships, a couple times the Tigers won the World Series, and quite a few Stanley Cups. It's been awhile and I can see how the youngest fans would think that. If the 9ers weren't in it, I'd be for the Lions too, and would be for them if they somehow win today and move on.