Well, the arguments concerning Blake and how Nolan's Batman story would continue are not really the focus here. This is about a Justice League movie, and Nolan doesn't have to explain much for that. It's going to be an ensemble movie; all that's needed is just what the Latino Review laid out - the story has a Justice League team being put together, and Batman shows up. No need to delve into the great mysteries of Rises; all you need is Batman there.
It makes as much sense as a man healing a broken back through sheer determination.
And look at Avengers - did we have an in depth examination of where Tony Stark's character had grown since Iron Man 2? No. Tony showed up for the party and kissed Pepper. His personal character arc was an aside that wasn't explored and didn't have to be explored.