Ok, up until now, the rules for any Smash Bros game concerning characters have been that the character must have originated on a Nintendo Console and cannot have appeared on any other console. However, with the appearance of Snake, the rules have changed.
Officially announced returning characters, as shown in the trailer, are Mario, Link, Kirby, and Pikachu. I'd expect a few others to return as well, but you can post your opinions concerning that.
Newcomers from the Nintendo universe are Pit from Kid Icarus, Wario, Metaknight from Kirby, and Zero Suit Samus (I hate when they reuse the same character in a different suit as a SEPARATE character).
The biggest surprise is of course, Snake from the Metal Gear series. Because he originated on a Nintendo console, he has somehow slipped through the cracks.
The rules have changed. If Snake is in, then other characters having originated on Nintendo consoles might make appearances too. Submit your opinions and possible hidden characters. In addition, you may submit possible moves for characters that have been suggested. Remember to try and suggest B+up, B+down, B+left moves (special attacks), A+up, A+down, A+left moves (melee attacks), as well as throw attacks.
Sonic (Sonic the Hedgehog)
Long time rival to Mario from an entirely different dimension. The two have been destined to clash. Powers are derived from his supersonic speed. Moves include spin dash and possibly a B and Up move similar to Fox's in which Sonic temporarily goes Supersonic and back.
Viewtiful Joe (Viewtiful Joe)
The unlikely cinematic hero Joe, fully equipped with familiar moves and powers from his own series.
The original robot boy, equipped with a chargeable buster cannon that changes effects depending on the last enemy he has defeated.
Ryu Hayabusa (Ninja Gaiden)
Appearance similar to that in his recent return, with an alternate costume similar to the one accesible in that newer title.
Crono (Chrono Trigger)
Not familiar with this one, never played the game. Help me out with some details.
Simon Belmont (Castlevania)
Equipped with his trademark whip and a few spells to boot. Unfortunately with no Vampires to slay, he's got nothing to do but slap plumbers around.
The persistant lightweight boxer with fiery punches. Boxing themed moves. (Wow, what if the Wii has a new punch out? Controller in each hand, boxing glove action...)
Niki (Kid Niki)
Help me with details guys.
Shadow Mario (Super Mario Sunshine)
The mysterious blue Mario imposter with a wicked tongue and a magic paintbrush to boot.
Geno (Super Mario RPG)
Older, taller appearance with the same cool visual style and clothing.
A computer virus brought into the physical realm who once believed he was a Pokemon. His appearance is a glitchy mash-up of polygons from various characters, and his moves are sometimes unpredictable.
Appearance based on the visual style of the original Rob Robot and the images used in Starfox games. Rob's logic matrix has decided that the best way to protect Fox in his new environment is to build himself a combat body and enter the fray himself.
Isaac (Golden Sun)
It's been forever since I've played this game, but his moves would be a combination of sword combat and adept magic, as well as Djinn summon stuff I suppose.
Felix (Golden Sun 2)
Same as Isaac