Lol, I wasn't 100% on the last name anyway. Also, I watch Zero Punctuation, so watching Extra Credits isn't that big a stretch. I'll take a look.
Edit:
I'm guessing you meant the Other M improvements thing specifically. I'm watching it right now and I just want to say this:
Mario and Luigi deserve to be deepened IN A GOOD WAY. Their personas in this game will be based on a cross-section of their behavior in the Paper Mario and Mario and Luigi series as well as their personalities in the cartoon series. They will still look and sound like we (well, I) always imagined them and how we've seen them. Remember, I'm a huge fanboy; specifically a Mario fanboy, so they will be correct.
As for Samus? Consider Other M not considered. Samus is NOT a pussy and she does NOT need a father figure. She is the most badass bounty hunter anyone has ever seen and even Boba Fett s**ts his pants at the sight of her gunship. THAT is who Samus Aran is. She is the badass chick who you do not f**k with. She's the one who has Kremlings begging for her not to shoot them, then uses her grapple beam to toss them halfway across town saying that "it's not technically a gun". Actual scene from the first volume of the comic I did. Samus will be badass. She will be "take no prisoners, let's get this done because it's the right thing to do, nobody hurts my friends and gets away with it" badass Samus. Period. BUT! She will also have one thing that I liked from Other M: She loses her cool when she sees Ridley. The guy killed her parents. He's almost killed her several times. She has a lot of complex, negative emotions about him and they will show.
Kirby, Dedede and Meta Knight will be like they are in the anime. It was written by Sakurai, it's canon, moving on.
Red will be primarily based upon his persona in the Pokemon Adventures manga with some changes for story and exactly WHY he was chosen by Arceus to represent their world. In this continuity, he's their Chuck Norris. He's their champion. He's the best trainer in the world. Oh, and Blue is jealous as all get out that Red was chosen over him.
Link; here's a toughie. He has never had a speaking role outside of the cartoons, and I'm almost tempted to keep him silent because of that. I dunno; if anything, he won't say much, at least not until I've played more of the LoZ games. Again, consider his personality in the cartoon not considered. Excuse me for thinking Link is not a dick. He isn't.
Sonic talks in the games and the cartoon. He's quick to act, quick on the uptake and quick to make jokes and keep it light. Easily the comic relief.
D.K.'s persona is from Donkey Kong 64, as will the world when they get there. He's the most "fleshed out" in that game, anyway.
Fox and Falco also speak, so no real trouble there. Fox will have some daddy issues because he's constantly being compared to James, but he and Samus will almost be kindred spirits because they both lost their parents to an enemy they fight to this day.
Then there's the "cameo" heroes. They'll have their own worlds, but they won't be permanent members.
I can already tell Captain Falcon is going to be fun. A slightly less douche-y, way less of a misogynist, still super cocky version of Duke Nukem, and constantly hitting on Samus. She's the hardcore broad he's been looking for his whole life, so she's basically going to be the method by which his character is expanded.
Olimar isn't going to be too hard. He's just a simple guy who wants to go home. I have his captain's logs to build him off of.
Pit is clearly badass. Can't wait for Uprising; his personality will be right out of that. He's a kid on a mission, he has a duty to Palutena and he gets the job done.
Snake won't be hard; we know who he is.
Peach's personality will be closer to the Paper Mario series than in the cartoon. She's a clever girl and stands by her friends.
Zelda is far less dainty and more badass than Peach. She rarely fights as herself, but changes to Shiek to do it and she takes no prisoners.
Diddy will make an apperance in the Kong Isles chapter and will be based off of DK64.
Wario...oy. This guy is going to be fun. Based off of his behavior in the WarioWare series as well as in Mario Golf/Tennis. He's going to beg to join the Dark Brotherhood. A lot. When...ONE of the members turns sides, a slot opens for our gaseous Mario doppelganger.
Robot, the leader of the R.O.B.s will honestly probably be the deepest character of them all when it comes to motive. He works for his people's best interest. He does what he feels he must. He follows orders. Still, he has doubts and he's the only R.O.B. who even can. The others follow his orders without question. But whose orders does Robot follow? Would Master Hand truly turn his back on the Worlds or is another sinister force manipulating one of the only sentient beings who has ever seen the Creator with his own eyes? Hmm...
So, just to alleviate your fears; I love these characters and if I feel I can't represent them properly, I won't try; I'll ask for help or leave them out. I'm tempted to do that with Earthbound and Fire Emblem considering we never even got most of those games in the US. That said, all of the other franchises will be appearing including Mr. Game and Watch. Don't worry; no expansion there, but he does have a cool origin story. As do the R.O.B.s...
Edit:
Almost forgot something! Mario and Peach. Is there something there? Miyamoto has hinted at it, but never expanded on it. My answer? Yes. Yes, there is. Problem: Mario has been in the friend zone with Peach for twenty-six years. She's not sure how he feels about him, and he's not even sure about how he feels about her. Think about Ross and Rachel from Friends; they love each other but stupid things get in the way. Consider Bowser their Paolo, their Emma and their "we were on a break" all rolled into one. But when the safety of the universe rests on Mario telling Peach how he really feels? Oh, I will get that scene and their relationship right, so help me. Again, again. GIANT MARIO FAN. I will not screw this up; that is my freakin' pledge.
Edit AGAIN:
Holy crap, Red actually HAS a character! I changed his summary to reflect it. I guess I should read the Pokemon Adventures manga, huh?