I saw an estimate yesterday of 200,000 people. Seemed super low. I know it won't be the Super Bowl 50 Broncos, but Denver loves this stuff.
Also, even with tons of transplants, I think Denver still has flashbacks to not winning a title until 1996. We never know if it will happen again and are always sort of surprised when it does!
I was there for the Broncos parade in 2016 and it was absolutely insane. Never been a part of anything like that before. I think they'll get close to 300,000, but seeing it so far, yeah, it could be more than that.