Who in God's name is John Blake?

So we haven't brought up who John Blake is in a while. It used to be a daily thing, but I suppose after the pictures and trailers people have assumed to be what he said he was "a gotham city beat cop." But you know I just watched the brand new trailer and Im sorry but it does not look like it to me. Now why would a regular run in mill cop be in almost the entire trailer? He seems to play a very important role in the movie. Now it was almost pretty much confirmed Miranda Tate is actually Talia al Ghul you cant fake those pictures. So heres what I think Nolan took one look at the Avengers and was like dang we need like twenty more characters in my movie to beat them. Nobody is better than Chris at keeping secrets even Two Face was pretty well hidden in The Dark Knight. I knew Harvey Dent was in it but it never showed him turn into Two Face in the ads obviously. So back to Blake somebody I believe on CBM brought up an interesting point that John Blake suspiciously rhymes with Tim Drake a.k.a Robin. But as everyone also knows nobody on here likes Robin at all. I like Robin and I think he has potential but I can see why others disagree. Remember in Nolan we Trust so he probably could do a cool way of introducing a better Robin and I know he said he wasn't going too and that Dick would be in his crib because this is a young Batman but remember kids this movie is after eight years which the two films before could have been over a long period too enough for Boy Wonder to become Man Wonder, see what I did there. There is also rumors of him being Azrael but so far there is not enough proof and he isnt that well known. I also think that he could be a replacement for Batman or at least thats what the trailer suggests. But then again everyone knows Bruce Wayne as Batman the media knows nobody else it would just be weird. But also then again it could be a franchise reboot career starter for JGL. So basically what i think is he is either Robin or a replacement for Batman. Tell me what you think??