Hmmm. i seriously doubt that. Nintendo most likely just a hired an athletic healthy person to represent changing image of the "casual" gamer. The advert is merely no more than this. Personally I don't think the advert did Metriod justice.
Reason 1: Its unlikely anybody like the woman on the advert would play Metriod.
Reason 2: They don't portray the story line, just the controls, thus just adding to the idea that nintendo have a gimmick they like to show off.