Ho... Hmm...
There is much to reflect on, here.
I would say, in a pre-Other M world, that this whole affair is a bunch of sound and fury signifying nothing. Her sexualization was incidental, simply an expansion upon the reward that was offered up in the first game, which itself was a last-minute addition for shock value. It was a way of saying "you've reached a better tier of reward," without explicitly saying so. Indeed, in Metroid Prime 2 & 3, the bigger reward wasn't getting to see more of ZSS, but getting the sequel hook instead.
Other M is a whole separate discussion, of course, one in which we both have made our opinions well known over the years, and where a lot of the apparent sexism can be attributed merely to lack of context (in why exactly she froze up over Ridley) and cultural blind-spots (over the unflinching obedience to Adam). The only indisputably egregious matter there is the heels in the Zero Suit
Of course, your argument asks for more games in the vein of Metroid Prime, something i would very much want (best game EVAR), but i feel that a lot of this hardly qualifies as sexism, but something that sorta looks like sexism if you squint at it right.
Monster Hunter: pissing me off since 2010.
