Nice find.
Of course, it confirms nothing, but i'd be willing to say it does help Marth's inclusion, especially considering that Earthbound is there and we know that Ness is in.
And for all the idiots going, "OMGZ Ridley confirmed!!!", here's something to think about. Ridley was not the main character in Super Metroid, but Marth was the main character in Fire Emblem 3, and that update does talk of the past fights of the characters.
Isn't it strange how the other games he puts up have their main character confirmed?
Super Mario Bros. - Mario
Ice Climber - Ice Climbers
The Legend of Zelda - Link
Kid Icarus - Pit
Kirby's Adventure - Kirby
Super Metroid - Samus
Earthbound - Ness
Starfox 64 - Fox McCloud.
I love how you're all so petty in trying to debunk a THEORY with some actual grounding that you decide to choose a character who isn't the star of one of the games as an example.
Like i said, this doesn't in any way confirm Marth, but stop being ***** and bashing anyone that comes up with a theory that's actually based on something.