I'll answer, even though you didn't ask me. Manning threw for 10,000 yards, and won 25 of 32 games over the past two seasons. He was playing just fine earlier in the year and then he clearly was hurt. If the injury can heal and you can get Manning back to what he was the first 10 weeks of the season then he instantly gives you the best chance to win a Super Bowl next year over any of the job openings currently available.
That being said I don't think Denver is doing that. They have a ton of free agents and no cap space, pretty sure they are going to dump old vets, resign their young talent and try to rebuild without Manning.
Just for fun, how about a patched up Manning and Fox/Gace combo for da bears next year? Oh one can dream lol.