I tend to agree here. The “as” in “as by portraying” could be read as “for example by portraying” - it doesn’t necessarily mean you have to portray the same characters."Prefigure" is probably the key part of that definition, not the example of using the same characters at a younger age.
Is it really "evolving"? The word seems to be older than I am and it's pretty much meant the same thing for over half a century.
But language is constantly evolving so the definition may well be changing - as with anything, though, we’d need evidence of speakers discussing the “latest” meaning. Which is what we’re almost doing here - yet there’s not much in the way of examples of a prequel that *has* to involve the same characters or that has *not* to involve the same characters. I suppose it’s essentially this distinction between DSC and the other prequels listed in the title of this thread that made me want to begin this discussion in the first place
