Super Smash Bros. for Wii U isn't far away, due in late November / early December depending on your region. Logically development should be drawing to a close, as a result, though Masahiro Sakurai — in his most recent Weekly Famitsu column — has said "I'm not done yet...". There's still work to be done.
Of course, a variety of elements of the Wii U iteration are still a mystery at the moment, with modes and system-unique features still largely unknown. It seems that may change, however, as Sakurai-san has stated an announcement will come soon and show off the "true potential of Smash Bros." — we hope it'll be a follow-up to the Super Smash Bros. Direct from earlier this year.
Elsewhere in his column Sakurai-san outlined the challenges and demands of development, though he's thankful for his team and the gamers that buy the finished result.
Game development is very hard. You cannot get through it without sacrificing everything, including your own private life, and you often get hurt. However, I'm grateful that so many people have been involved, for the games that are completed, and all the people who play the games.
We're certainly due an information blow-out on the upcoming Wii U release, and based on these comments we don't have long to wait. What do you still hope will be revealed for the home console Super Smash Bros.?