It's less than a week until Nationals. I think it's safe to say that Yuzuru will withdraw, if he isn't back in Japan by now. As far as I remember the teams for Olympics, Worlds and 4CC are announced at the same time, shortly after Nationals are over. So at that point we will probably also know if Yuzuru is going to 4CC. It's possible that he will be chosen for 4CC and then later won't go, because that variation is safe. If they decide on a team sans-Yuzuru for 4CC they cannot renounce that, if Yuzuru decides he wants to go after all. So other than Olympics (which is Yuzuru/Shoma/SkaterX) I'm more interested in the 4CC lineup. I could even imagine Shoma going to 4CC.
Worrying is the lack of training. I'm sure the professionals that work with Yuzuru have the right idea, and know how to handle these injuries, but I wonder if he can really train a 100% and concentrate on his quads or if that's too risky, considering the injury could get worse again?