Manning seemingly has made a PR blunder. He had a chance to retire in the last month but didn't do so, and now faces the unnecessary embarrassment of being cut by the Broncos, which is going to happen on Monday unless a press conference or statement is arranged between now and then. Getting cut doesn't really mean anything--as most people still expect him to retire and it is well know that he's done with the Broncos.
Still, it's something he might have avoided--unless he really does want to play another year. I haven't heard of any interest in him from any team. It's possible that the LA Rams or the Browns might want to sign him to a modest contract and let him compete for the starting job--but they'd be stupid to give him big money and assure him the starting job, given his age and his struggles last year. One wonders what a diminished PM would gain from playing one more year for a team that has been bad--it doesn't make a lot of sense, frankly. It's possible that the resurfacing of the training-room incident 20 years ago may have delayed his retirement announcement. You don't want the retirement announcement for an illustrious career tainted by questions of whether or not you put your cajones in a female trainer's face, that's for sure. PM may not care about getting released, may see if there is any interest from teams, and if not, call it quits. That's how it is looking now.