Super Smash Bros. Finale

Super Smash Bros. Finale is the supposedly last game in the Super Smash Bros. installment. It would be released after several sequels were made to Brawl. The game would play very similar to the past installments, but have several new content.

Characters
The characters in Super Smash Bros. Finale would obviously be plentiful. There'd be 300 playable characters in the game. I may not even get to listing them all. But I suppose I will.

Mario Series

 * Mario
 * Luigi
 * Peach
 * Bowser
 * Toad
 * Daisy
 * Waluigi
 * Birdo
 * Bowser Jr./Shadow Mario
 * Petey Pirahna
 * King Boo
 * Rosalina
 * Dry Bowser
 * Paper Mario
 * Paper Luigi/Mr. L
 * Paper Peach
 * Paper Bowser
 * Fawful
 * Mallow
 * Geno

Donkey Kong Series

 * Donkey Kong
 * Diddy Kong
 * Dixie Kong
 * Funky Kong
 * King K. Rool
 * Tiny Kong
 * Cranky Kong
 * Kiddy Kong
 * Donkey Kong Jr.
 * Stanley

The Legend of Zelda Series

 * Link/Wolf Link
 * Zelda/Sheik
 * Ganondorf
 * Toon Link
 * Young Link
 * Vaati
 * Skull Kid
 * Toon Zelda/Tetra
 * Toon Ganondorf
 * Tingle
 * Midna
 * Zant
 * Dark Link
 * Fierce Diety Link
 * Saria
 * Darunia
 * Ruto
 * Nabooru
 * Impa
 * Rauru

Metroid Series

 * Samus/Zero Suit Samus
 * Dark Samus
 * Ridley
 * Mother Brain
 * Skylux
 * Kanden
 * Noxus
 * Trace
 * Spire
 * Weavel

Yoshi Series

 * Yoshi
 * Kamek
 * Baby Mario
 * Baby Luigi
 * Baby Bowser
 * Baby Peach
 * Baby DK
 * Baby Wario
 * Baby Yoshi
 * Shy Guy

Kirby Series

 * Kirby
 * Metaknight
 * King Dedede
 * Dark Matter
 * Nightmare
 * Gooey
 * Knuckle Joe
 * Bonkers
 * Golem
 * Adeline
 * Lololo & Lalala
 * Blade Knight
 * Marx
 * Sir Kibble
 * Bronto Burt

StarFox Series

 * Fox
 * Falco
 * Wolf
 * Krystal
 * Slippy
 * Leon
 * Panther
 * Peppy
 * General Pepper
 * R.O.B. 64
 * Pigma
 * Andross
 * Andrew
 * Tricky
 * Marcus

Pokemon Series

 * Pikachu
 * Jigglypuff
 * Pokemon Trainer
 * Lucario
 * Mewtwo
 * Pichu
 * Mew
 * Rotom
 * Arceus
 * Hitmonlee/Hitmonchan
 * Machamp
 * Gallade/Gardevoir
 * Darkrai
 * Clefairy
 * Croagunk
 * Blaziken
 * Croconaw
 * Turtwig
 * Dragonite
 * Alakazam

F-Zero Series

 * Captain Falcon
 * Samurai Goroh
 * Dr. Stewart
 * Pico
 * Jody Summer
 * Black Shadow
 * Blood Falcon
 * Mr. EAD
 * The Skull
 * Zoda

Earthbound/Mother Series

 * Ness
 * Lucas
 * Ninten
 * Masked Man
 * Porky
 * Claus
 * Giygas
 * Jeff
 * Paula
 * Poo (what was Nintendo thinking when they named him?)

Fire Emblem Series

 * Marth
 * Ike
 * Roy
 * Sothe
 * Dark Knight
 * Hector
 * Ashnard
 * Elincia
 * Lyn
 * Eliwood

Ice Climber Series

 * Ice Climbers
 * The Albatross

Kid Icarus Series

 * Pit
 * Paulutena
 * Medusa

Game & Watch Series

 * Mr. Game & Watch
 * Diver
 * Fireman

Wario Ware,Inc./Wario Land Series

 * Wario
 * Kat & Ana
 * Dribbles & Spitz
 * Ashley
 * Jimmy T.
 * Dr. Crygor
 * Captain Syrup
 * Denpu

Pikmin Series

 * Olimar
 * Louie
 * The President

Nintendo Series

 * R.O.B.
 * Mii
 * Shigeru Miyamoto

Punch-Out!! Series

 * Little Mac
 * King Hippo
 * Soda Popinski
 * Bald Bull
 * Bear Hugger

Star Tropics Series

 * Mike Jones
 * Dr. Jones

The Legendary Starfy Series

 * Starfy
 * Stapy
 * Ogura

Custom Robo Series

 * Ray
 * Annie
 * Bayonette

Golden Sun Series

 * Isaac
 * Ivan
 * Garet
 * Mia

Drill Dozer Series

 * Jill

Shantae Series

 * Shantae

Mach Rider Series

 * Mach Rider

Balloon Fight Series

 * Balloon Fighter

Duck Hunt Series

 * Duck Hunter

Clu Clu Land Series

 * Bubbles

Shin Onogashima Series

 * Donbe

Panel de Pon Series

 * Lip

Advance Wars Series

 * Jake
 * Sammy

Chibi-Robo Series

 * Chibi-Robo

Henry Hatsworth Series

 * Henry Hatsworth

Metal Gear Series

 * Snake
 * Liquid Snake
 * Naked Snake
 * Iroquois Pliskin
 * Big Boss
 * Raiden
 * Gray Fox
 * Metal Gear Rex
 * Metal Gear Ray
 * Meryl

Soinc the Hegehog Series

 * Sonic
 * Tails
 * Dr. Eggman
 * Knuckles
 * Shadow
 * Amy Rose
 * Vector
 * Blaze
 * Metal Sonic
 * Silver
 * Rouge
 * Big
 * Cream
 * Espio
 * E-123 Omega
 * Charmy
 * Jet
 * Eggman Nega
 * Chaos
 * Tikal

Megaman/Megaman Zero/Megaman X

 * Megaman/Megaman X
 * Proto Man
 * Bass
 * Zero
 * Dr. Wily
 * Dr. Light
 * Guts Man
 * Cut Man
 * Heat Man
 * Ax

Final Fantasy Series

 * Cloud
 * Sephiroth

Bomberman Series

 * Bomberman

Crash Bandicoot/Spyro the Dragon Series

 * Crash
 * Coco
 * Spyro
 * Cynder

Pac-Man Series

 * Pac-Man
 * Ms. Pac-Man
 * Blinky

Tales Series

 * Lloyd
 * Kratos

Crono Trigger Series

 * Crono

Naruto Series

 * Naruto
 * Sasuke
 * Sakura
 * Rock Lee

Bleach Series

 * Ichigo
 * Renji

Dragonball Z Series

 * Goku
 * Vegeta
 * Kuririn
 * Piccolo
 * Freeza
 * Trunks

Halo Series

 * Master Chief
 * Arbiter

Rayman Series

 * Rayman
 * Rabbid

Assassin's Creed Series

 * Ezio

Prince of Persia Series

 * Dastan
 * Farah
 * Vizier

Street Fighter Series

 * Ryu
 * Ken
 * Chun-Li
 * Guile

Call of Duty/Call of Duty:Modern Warfare Series

 * Salt McTavish

Star Wars Series

 * Luke Skywalker
 * Anakin Skywalker/Darth Vader
 * Obi-Wan Kenobi
 * Yoda
 * Darth Sidious
 * Count Dooku
 * General Grievous
 * Mace Windu
 * Darth Maul

Avatar Series

 * Aang
 * Sokka
 * Katara
 * Prince Zuko

The Lord of the Rings Series

 * Aragorn
 * Gimli
 * Legolas
 * Gandalf

Viewtiful Joe Series

 * Viewtiful Joe

Ninja Gaiden Series

 * Ryu Hyabusha

Teenage Mutant Ninja Turtles Series

 * Raphael
 * Leonardo
 * Michaelangelo
 * Donatello
 * Shredder

Super Smash Bros. Series

 * Red Alloy
 * Yellow Alloy
 * Blue Alloy
 * Green Alloy
 * Master Hand
 * Crazy Hand

Considered

 * Tabuu
 * Homer Simpson
 * Peter Griffin
 * Masahiro Sakurai
 * Koopa Bros.
 * Butters
 * Mickey Mouse
 * Sorromon (I'm not sure if I spelled it right)