The way I see it - Khan will not work if he's redone unless he has the backstory that connected him to Kirk in Space Seed.
They would have to actually remake Space Seed and ignore TWOK, since they have already used elements of the latter in the first film.
My suspicion is that they will not use him - becuase I also do believe they won't be able to do it better than TWOK did.
I would prefer to get out into the unknown of deep space and find an adventure there instead. That's my two cents!
'If the Apocalypse starts, beep me!' - Buffy Summers
'The sky's the limit.....' Jean-Luc Picard, 'All Good Things'
courtesy of Saquist