If you believe that teams can control what information and when is released, why would the 76ers let this out at this time? Philly has done some strange things so who knows what they may be up to. I would think that no matter what the condition of Embiid, they are going to take the player they see as the best and sort out the depth chart later.
In terms of the Celtics trading for Embiid? I don't think the Celtics can afford to risk assets on such a high-bust potential player right now (I am assuming they have to give up pretty good value for Embiid). He certainly still has the potential to be a star, franchise player but after a year since being a risky draft pick, he has only gotten more risky. I guess as with any trade, it depends on what you give up.