There's no way to know, but I really didn't feel like Donald's retirement talk was B.S. Yes, he came back for an insanely high amount of money and a shot at a repeat championship, but one of those is basically dead unless he's willing to play a few more years. He's rich. He's not stupid rich, but playing a few more years won't get him their either.
Donald has somehow survived his NFL career without a significant injury. To put things in perspective, his potential high-ankle sprain this year is probably the worst injury of his career. That's feels like a good year for Saquon Barkley.