There's no instant cure for it, so all I can do is either block the pain with injections or put my arm in a cast to keep the ruptures from spreading. I was told that the important thing was to keep my arm as rested as possible. In order to get it fully healed, the only thing is to not use my right arm or hand. So not only am I using a trackball with my left hand; now I'm using it to eat, brush my teeth, wash my hair, and even drive as much as I'm able to.
As a director, I don't have much time in the weekdays to proceed along with my own work. The entire day is spent overseeing other people, holding meetings, working on other proposals, making visits elsewhere and so on. If I can get everything squared away, then I can work on my own stuff, but most of the time there's just an overwhelming lack of time. Often I go in on my off-days to catch up on my own work, but with my body going on me like this, I have to cut these extra days out of my schedule and even with that I can't use my right arm very much to control things. If this disorder lingers, or if it never gets fixed, there's no telling what impact that would have on the project.
I've had to control two characters at once in a lot of game projects up to now, so as long as I keep it to simple moves, this works well enough. It doesn't go that easy with the Nintendo 3DS version, though, and the debug camera is pretty hard to control. Still, now I realize how important it is to have your health. I'm glad I'm still in good enough shape to work." - Masahiro Sakurai
Health is certainly the most important thing here. I think we'd all willingly let Smash Bros. take a dev delay in order to let Sakurai nurse his wounds. He's given us years and years of great gaming content. Giving him a break seems more than fair.