In this game, characters make more of difference than ever. Clones have had edited movesets to allow for more unique fighting techniques. The spotlight is on the newcomers, which is evident in the Subspace Emissary mode. No characters have been announced.
Developent started for this game at the formation of Beanstalk Inc., in the winter of 2011. Several details were plotted out at that point, and the main gimmick of the game didn't have to deal with the story mode. The working title was Smash Brothers 3D, and the game was to be a 3D brawler instead of 2D. Originally 100 characters were planned, but ulimately cut to limit repeditiveness and engage a further connection with every character in the story mode.
Several cut characters included the veterans Marth, Meta Knight, Doctor Mario, Zero Suit Samus (as a seperate character), Mewtwo, Pokemon Trainer, and R.O.B. were originaly planned, and in certain cases listed in the website's coding (when Toon Link was revealed, the coding in the website implied Marth would be the revealed one). The Ice Climbers and Pichu were heavily considered, but ultimately dropped. No other veterans were considered. Additionally, Zora was revealed on the offical website but quickly withdraw. Early gameplay footages shows flashes of Wonder Red, Captain Rainbow, and Meta Ridley in brawls also.