In the column he regularly writes for Famitsu magazine, Masahiro Sakurai (creator of both Kirby and the Smash Bros. series) mentioned pain in his right arm and hand last month. This week, he reported on the full diagnosis, and from the sounds of things, it's an enormous pain.
Don't you overwork him!
*Sniffles*
According to some of the interviews,
the Next Smash Brothers is going to be different.
Here is a Link to IGN art.:
http://www.ign.com/articles...
"I intend to change direction a little as we go," Sakurai said, indicating his desire to possbily find a new mechanic or idea to drive two new entries in the series. "The key to that's going to be its dual support for 3DS/Wii U."- Masahiro Sakurai
I've heard many accounts of some of the higher ups on the design teams actually saying they wished they could go back and just do some programming or creating art.