They've added Wario and Zero Suit Samus to the character pages with new images and bio's for them.
Looks like the Zero suit Samus is not a fully selectable character and instead, regular old Samus will shed her armor if certain conditions are met. Zelda could transform into Sheik in the last game, so maybe Samus could just shed her armor with a button combination, although why you would want to just throw away the awesome arm cannon is a mystery to me.
site: http://www.smashbros.com/en/characters/chara3/index.html
Looks like the Zero suit Samus is not a fully selectable character and instead, regular old Samus will shed her armor if certain conditions are met. Zelda could transform into Sheik in the last game, so maybe Samus could just shed her armor with a button combination, although why you would want to just throw away the awesome arm cannon is a mystery to me.
site: http://www.smashbros.com/en/characters/chara3/index.html