I'd be wary of any speculation right now. I see this as possibly a few things. 1, Sixers are trying to play games before the draft to make sure they get who they want at #3 or force teams to trade with them. 2, Embiid is legitimately hurt, and his season and career are in real jeopardy. 3, Embiid is doing relatively okay, but recovery is a little behind, and they don't want to risk any serious damage in the summer league, so they announce this after they find out the news, but he should be totally fine for the season. I don't see any particular reason right now why any one of these is less likely than the other, so I'm not jumping to conspiracy/sky is falling for Philly conclusions yet.