It's the Borg next.
Not sure what else you can do with Khan in a next movie that they didn't already do here.
That's what I'm thinking. Probably a mash up of Q Who
and The Best of Both Worlds
. The Narada
's incursion and subsequent Vengeance
happenings arouse the interest of Q about a hundred years early
They did a good job recasting Khan, I'd be interested to see who Abrams and co. would cast as Q (I also wouldn't mind seeing both Anna Torv and John Noble being given characters in this universe).