Just in case anyone would like to see Samus' zero suit appearance in the Zelda II of Metroids, MPH, here is an extremely
spoiler filled and somewhat fuzzy
video.
That is how ZSS should look within the context of a "realistic" (read: western style) Metroid game (I am looking at you MP2).
Do not think though that I find the more "anime" style ZSS any less deserving of being part of the Metroid series, I like them both.
EDIT: Some things I forgot to mention; I was trying to get this clip off of my copy of the game but my camera would not cooperate, thus I looked for it on youtube, also, I really like MPH, but every Metroid fan I have talked to hates it, thus the comparison with Zelda II (which is tied for my second favorite Zelda game), because MPH also shares it's fate as the redheaded stepchild of it's series.