I believe Smash started development in late Feburary. KI:U went gold in January. If you are curious, that's why I said 16.I thought that couldn't be right... but it is O.O Mind blown.
So why is everyone projecting a mid/late 2014 release date..? THat'd be a crazy long development cycle, even for smash.
The reason for mid/later 2014 is because people think this game will be in development for longer because it's two games. I disagree. I suspect both games will use the same engine and the splitting of the game is likely to expand the main game and the Adventure mode. My guess is early to mid 2014.