I dunno, like others I'd still prefer to see some 'exploring strange new worlds' rather than a re-tread of an earlier episode. Khan's a human villain - part of this world, rather than anything remotely alien; he's also a 'time traveler' of sorts too, thanks to being cryogenically frozen for centuries, which further detracts from the originality of any potential Khan story.
I'm not saying that it can't happen or can't be good - after all, I thought "time-traveling Romulan pirate from the future" sounded daft the first time I heard it - but for me, Trek should be about more than just humans fighting other humans in space.
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