Before we begin: there are no spoilers in this post.
Now that that's out of the way, Bills running back LeSean McCoy did share some spoilers to the new Avengers movie (see: here and here if you have already seen it or do not care) and Twitter was more upset than they were after Buffalo finished at 6–10 last season.
11 years of Marvel movies have been interconnected through the Avengers franchise but the latest release–aptly named, Avengers: Endgame–marks the culmination of it all. As tends to happen when a series ends, some serious plot twists may or may not happen.