Abrams ran out of Trek ideas after one film and had to recycle The Wrath of Khan for his second film. I think THAT says it all.
See, that's just rude.
Maybe he thought that was what we
wanted - and from what I recall on this board, for a good many of us, he was right! So many people here speculating on Khan being in it that if he made his decision by reading our board (doubtful, but still) and seeing what idea was generating the most buzz, then we probably would have selected Khan for him.
Why does it have to be that he "ran out of ideas"? He was an admitted outsider - primarily a Star Wars fan - trying to make us happy!