I really dislike your use of the word "kiddy" and "mature" but, whatever excuse you would like.
Fire emblem, they have more fire emblem games than most people realize, I hope this one makes it to america.
Never played Faxxanundo, can't comment on it.
Mother 3 is currently in devolopement for the GBA.
Golden Sun is NOT a nintendo franchise, its purely owned and made by camelot. Likewise, the rumors stated an "Golden Sun" for the gamecube.
Raven Blade was an RPG? I was under the impression it was an action game.
Act Raiser is a square franchise, and a very strange one at that.
Never played a Star Tropics either, constantly hear good things about it.
FFCC, i don't really understand what you were trying to argue with this. But, Odds are square will have another cube game shown at E3, though i'm not sure what type of game it will be.
Likewise, you already forgot the RPG's that *ARE* coming out for cube later this year.
Paper Mario 2.
Baiten Kaitos: new, original Namco RPG
Tales of Symphonia: also made by namco... part of an incredibly popular franchise in japan, that never really got the acceptance over here.
Pokemon, as well, would be a great game to finally bring to the next generation, but I'm under the impression nintendo wants to keep the "pocket" aspect of the game.