Which means they will have their roster plans locked within the next six months to a year. So lets start looking at the currently relevant characters.
Well, let's see how things turned out with Brawl. It's development started in October 2005. What games were relevant at the time for each character?
(Character:latest major game at start of development:release date of game)
*- in development
** All release dates are the Japanese release dates
Mario: New Super Mario Bros*: May 2006
Luigi: New Super Mario Bros*: May 2006
Peach: New Super Mario Bros*: May 2006
Bowser: New Super Mario Bros*: May 2006
Donkey Kong: DK King of Swing: May 2005
Diddy Kong: DK King of Swing: May 2005
Yoshi: Yoshi Island DS*: November 2006
Wario: Wario Ware Touched: December 2004
Link: Twilight Princess*: November 2006
Zelda: Twilight Princess*: November 2006
Shiek: Ocarina of Time: November 1998
Ganondorf: Twilight Princess*: November 2006
Toon Link: Phantom Hourglass*: June 2007
Samus: Metroid Prime Hunters*: March 2006
Zero Suit Samus: Metroid Zero Mission: February 2004
Pit: Kid Icarus: December 1986/August 2004 (rerelease)
Ice Climbers : Ice Climber: January 1985/August 2004 (rerelease)
ROB: Mario Kart DS*: November 2005
Kirby: Kirby Canvas Curse: March 2005
Metaknight: Kirby Canvas Curse: March 2005
King Dedede: Kirby Canvas Curse: March 2005
Olimar: Pikmin 2: April 2004
Fox: Star Fox Command*: August 2006
Falco: Star Fox Command*: August 2006
Wolf: Star Fox Command*: August 2006
Captain Falcon: F-Zero Climax: October 2004
Pikachu: Pokemon Diamond/Pearl*: September 2006
Pokemon Trainer: Pokemon Fire Red/Leaf Green: January 2004
Lucario: Pokemon Diamond/Pearl*: September 2006
Jigglypuff: Pokemon Diamond/Pearl*: September 2006
Marth: Fire Emblem Monshou no Nazo: 1994
Ike: Fire Emblem Path of Radiance: April 2005
Ness: Earthbound: August 1994
Lucas: Mother 3*: April 2006
Mr. Game and Watch: Game and Watch Gallery 4: October 2002
Snake: Metal Gear Solid 4*: June 2008
Sonic: Sonic and the Secret Rings: February 2007 *Sakurai says that he wasn't added until the summer of 2007*
Bleh... I'll write up where all these characters stand now later today... I need to take a break...