Super Smash Bros. for Nintendo 3DS / Wii U

Super Smash Bros. for Nintendo 3DS and Super Smash Bros. for Wii U are the upcoming fourth installments of the Super Smash Bros. series being developed for the Nintendo 3DS and Wii U. Like previous games in the series, they are being developed by Sora Ltd. and directed by Sora Ltd. founder Masahiro Sakurai. On June 2012, it was announced that Sora Ltd. is working alongside Namco Bandai Games in developing the games. In the Nintendo Direct of E3 2013, Mega Man from the Mega Man series by Capcom was announced as the third guest character of the series, after Snake and Sonic from Super Smash Bros. Brawl. During a Q&A with Masahiro Sakurai, during 2013's E3, it was revealed that both games may not come out at the same time. It was also revealed previous characters may not make it due to the 3DS's space limitations.

Gameplay
Not much is known about the two versions currently. Final Smashes will return from the previous installment in the series, Super Smash Bros. Brawl. Also, the "tripping" mechanic from the previous installment has been removed. Footstool Jumping, which was also introduced in the previous installment, will return. It was also stated that the games cannot crossplay, but can send customized fighters to each version ; details on this have not been revealed. In an interview, it was revealed that attack directions could be chosen when customizing. The game's speed has been said to have been increased from that of Super Smash Bros. Brawl, and is more along the line of Super Smash Bros. Melee ' s game speed.

On an additional note, it has been stated that the Adventure Mode for the two titles will not be like Super Smash Bros. Brawl's Subspace Emissary.

Also, touch screen controls for both consoles will not be included.

3DS version
The 3DS version has a cel-shaded graphical style, the characters being given outlines so that they can be seen better from a distance. However, there is an option to make the outlines thinner or make them disappear completely. The stages in this version are mostly based around handheld games. The bottom screen will be used for showing the characters' damage.

Wii U version
The Wii U version has HD graphics along with stages mostly from console games. It is not yet known what the Wii U's GamePad touch screen will be used for.

Confirmed characters
It has been confirmed that due to the limitations of the 3DS, there will not be much more characters to choose from, if not the same amount or less, than in Super Smash Bros. Brawl, and some will be left out in favor of newcomers. So far, 17 playable characters have been officially confirmed, consisting of 14 veterans and 3 newcomers:

Returning characters

 * Mario
 * Donkey Kong
 * Link - Link's appearance is a combination of his appearances in Twilight Princess and Skyward Sword.
 * Samus - Samus' appearance has been updated to reflect her appearance in Metroid: Other M.
 * Kirby
 * Fox
 * Pikachu
 * Bowser - Bowser's running speed and attacks are now faster.
 * Pit - Pit's appearance and moveset have been updated to reflect his appearance in Kid Icarus: Uprising.
 * Captain Olimar - Olimar's appearance has been updated to reflect his appearance in Pikmin 3.
 * Luigi - Luigi now scuttles in his jumps.
 * Princess Peach
 * Toon Link - In the Wii U version, Toon Link's appearance reflects his appearance in The Wind Waker HD.
 * Sonic the Hedgehog - His voice actor from Super Smash Bros. Brawl (Jason Griffith) has been replaced by his current voice actor; Roger Craig Smith. His mouth now moves to the side of his face as it does in the actual Sonic games.

Newcomers

 * Villager
 * Mega Man
 * Wii Fit Trainer

Others

 * (Mega Man)

Stages
According to Masahiro Sakurai, the 3DS version of the game is going to feature more stages based on games for Nintendo handhelds, while the Wii U version is to feature more stages based on home console titles.

Nintendo 3DS

 * A stage appearing similar to Battlefield from Super Smash Bros. Brawl.
 * Gerudo Valley, from The Legend of Zelda: Ocarina of Time and The Legend of Zelda: Ocarina of Time 3D.
 * A stage taking place on the Spirit Train, based on The Legend of Zelda: Spirit Tracks.
 * Arena Ferox, from Fire Emblem: Awakening.
 * A stage based on Super Mario 3D Land with one section taking place over a water area with Spike Pillars that rise onto the stage, and another section resembling World 1-1 with Donut Lifts.
 * A stage based on Nintendogs, taking place in a giant room with a Nintendog playing in the background.
 * A stage based on Chapter 11, "Viridi, Goddess of Nature", in Kid Icarus: Uprising.

Wii U

 * A stage similar to Battlefield in Super Smash Bros. Brawl.
 * Skyloft, from The Legend of Zelda: Skyward Sword. (Much like the Delfino Plaza stage from the previous game, platforms rise every few minutes to change to a different location in Skyloft)
 * A wrestling arena-type stage.
 * The city from Animal Crossing: City Folk.
 * Dr. Wily's fortress from the Mega Man series; The fortress itself is based on the design seen in Mega Man 2.
 * A stage based on Wii Fit.
 * Garden of Hope, from Pikmin 3.
 * A stage based on Pilotwings with Wuhu Island in the background.
 * Pyrosphere, from Metroid: Other M.
 * Windy Hill from Sonic Lost World.
 * A stage set in space.

Other

 * A stage that seems to be based on Donkey Kong Country Returns 3D.

Items

 * Capsule
 * Smash Ball
 * X Bomb