Lucina needs this alt costume:

Then the galaxy will be at peace.

on site, lucina didnt get a retangle banner as all others newcomers.
hers moves are identical to marth's...

maybe now some skins are characters too.

I guess I know who I'm going to be maining.

If you clicked on her box, you'll see her page lists her as a newcomer, I don't know why they didn't do the big rectangle, but she's definitely not a skin, she's a character. Will she be a clone? I don't know. But just like Falco, and Wolf, and even Young/Toon Link, they're characters, not skins.

Megaton!

Snake has been stealthfully revealed during this trailer, right under our noses.

Spoilers: Captain Falcon's butt is an alt of Snake. Boom.

Need visual proof? Ha. You're welcome:

So Lucina is confirmed to be a clone (main difference is the sword's hitbox is moved from tip to the whole sword)

Not really too big of a deal to me...it seems like she would have taken very little time to add and balance, so I can't really complain. I just feel she could have been an alt skin and no one would complain...

 Damn it, Smeags......

Stupid sexy Snake!

"Along with Robin, Lucina joins the battle!! Her physical ablilites are identical to Marth's--it must be in her D.N.A. However, where Marth's power is concentrated in the tip of the sword, Lucina's attack strength is balanced throughout the weapon, which might make her easier to control. She's also a little bit shorter than Marth."

"With the Wii Fit Trainers, the male and female Robins, the Villagers, and Little Mac, varying their appearances and voices works just like selecting alternate color variations. However, whenever there is even a small difference in abilities, that character gets an actual roster slot. That is why you can select Lucina individually."

"By the way…there's probably no chance you'll be able to see this in the game, but Lucina has the mark of Naga in her left eye."

So she does have the Mark of Naga in her eye! Good.