Dudes a Martian. But yes, I often wondered about that too, but more as a part of the overall ‘human diaspora’ feel of the original… which is lessened somewhat in the live action. Needed more voices, like we see in The Expanse with it’s somewhat similar setting. I liked Cho. But outside of America, if Spike *is* Japanese, there are things that come with casting a Korean actor. And we already know about that, because it was addressed in interviews when he played Sulu. Bringing that all full circle though, I really liked the older version of Spike here, possibly in pure story terms more than I liked the original. Because the age (let’s take ten years of Cho’s actual age xD) gave the events room to breathe for everyone. Twenties isn’t exactly time so fit a lot of tragic backstory, and to build back up from that, whereas the age here made things seem more real, which is ironically what you want in live action.