A few things I'm seeing.
First, Rodgers will not officially retire until after June's deadline, to push a chunk of his last check into next season. No matter what's transpired between him and the front office, that's not going to happen.
Secondly, I don't think he'd even consider a trade to a team that couldn't win 12 to 13 games with him, and will go all in, to have him on the field. I'm not going to go into salary, but it would probably one year at a time, with him having UFA status at the end of that year. At best, an option for him, for a second year, to guarantee him some extra money.
Now, on that potential trade. I believe it will come "after" the draft. Reason? Teams will want to hold this year's picks, but be willing to give up something next year. As far as what these potential suitors will offer? Don't think of it as a feeding frenzy. It's not going to be nearly as much as people think, and I believe some of the picks offered will be based on his performance with the new team.
This whole thing is a corn maze. Lots of dead ends in where it appears to be going, but when you figure it out, it will all sound so simple.