Yeah, I had never read that. It also says the following:Originally Posted by Trickz
"This isn't a pure character addition. Rather, under certain conditions, Samus will "remove" her Power Suit. Whoa! That's a woman under there!
Naturally, Zero Suit Samus loses power and stamina, so she should fight using the speed she gains instead.
Also, her gun transforms and can be used as a whip. Of the two, one might consider the whip to be her main weapon."
So Zamus (Zero Suit Samus) and Samus are the same character, like Princess Zelda and Shiek.
And while my guess that we might play as Zamus in Metroid Prime: Corruption could still happen, it appears the thing we've been calling a sword is actually a whip, which is what Samus used in SSBM to grab people, so that probably explains that weapon.
Gosh thanks for the tip, Trikz! If I had just read that, if we all had, we would have known the answer a lot sooner.