There's been some progress at last with regards the state of the next big screen adventure for Batman, given that we now know that David Goyer and Jonathan Nolan are working on a script for the film. We'd expect, although don't automatically assume, that this means Christopher Nolan is back on board for a third movie, too. All good there.

But what can we actually expect from a Dark Knight follow-up? Thanks to a source at Comic Book Movie - which hasn't been validated, so there's the usual pinch of salt to take - the story is beginning to take shape.

The site reports that the screenwriting in earnest is beginning this month, with the plot pretty much in shape. And here's where it gets juicy. For it's believed that the main villain in the next Batman film will be The Riddler, and that Arkham Asylum will be featured heavily in the story for the movie.

Furthermore, it's believed that we'll get to meet Dr Fries (although not Mr Freeze, presumably being saved for the fourth film in this particular Batman saga - that'd bode well...) and The Penguin, with Barbara Gordon's role being beefed up. Dick Grayson may appear too.

And here's the potential biggie. It was announced last week that Christopher Nolan was being brought in as a "Godfather" figure for the next Superman cinematic revival, and as such, Metropolis and Lex Luthor could be namechecked in the next Batman film.

How much of that is true? Couldn't tell you. The Riddler certainly fits the Nolan approach to the films, and the introduction of Superman elements would please Warner Bros no end. Read the full report at Comic Book Movie here and make your own mind up, but don't expect anything official until Christopher Nolan is done and dusted with this summer's Inception...