If there is ANYTHING to MacKenzie's tweet, here's my guess (assuming mckenzie knows something we don't) -
Bills are trading gabby davis for a big name receiver. Here's why I think that (solely based off mckenzie tweet). IF mckenzie knows something we don't, and they're delaying releasing the news, it's probably due to respect for the player (like Davis) to take in the news of being traded. They basically did the same thing when they cut barkley for trubisky.
That's all speculation obviously, just a guess if there's anything to be made of the tweet