We may not get an alternative outfit for Samus based on the current direction of palette swaps.
To be fair, IMO I think Samus's suits have less contrast to them than a gender change, Wario's two outfits or Little Mac's pink hoodie (which was probably just added because it already exists.) compared to the regular outfit being changed in colour. Change in the gender of a character is a lot more substantial. Samus as a character demands specific attributes for her visual identity, so you always know it's her just by the silhouette, so a lot of her suits and designs have these traits in mind. You can scribble a character with the arm cannon, broad shoulders and the distinctive visor, and you'll still know it's supposed to be Samus.
Something like a Justin Bailey Samus would stand out a lot, though.