Rich Johnston of Bleeding Cool has been hearing a lot of rumors about Andy Diggle replacing Grant Morrison on Action Comics come January. Apparently Diggle has even tweeted something about getting the "biggest job f his career" (read all about it at Bleeding Cool: http://www.bleedingcool.com/2012/08/20/andy-diggle-to-take-on-action-comics-after-grant-morrison/). Honestly, if this is true, Diggle's selection comes a a big shock to me. I don't think I would have pegged him as a Superman writer.
There are a lot of positives to Andy Diggle. Like Grant Morrison, Diggle is British, critically acclaimed, and had a great deal of success as a Vertigo writer. His series The Losers is well-regarded and was turned into a major motion picture. He had a good run on Swamp thing and I enjoyed his Thunderbolts. If Andy was selected to take Grant's place, I imagine it's because he's an intelligent writer who has the ability to think outside the box. There's a chance that he could be the man for the job.
The major thing that makes me hesitant about Andy Diggle writing Action Comics is that he's not really known for his work on superheroes and he's not really known for enjoying the task of writing superheroes. Rich Johnston even went so far as to say that Diggle has shown disdain for the superhero genre as a whole. I can't confirm this not having read many interviews with Andy, but if Rich said it then I'd trust his word. Part of what makes Grant Morrison's work on superheroes so special isn't just Grant's intelligence or his ability to write unique stories but also the fact that Grant cares about the superhero genre and puts a lot of thought into keeping it relevant to our world, philosophy, and politics. If Diggle really doesn't like writing superheroes then how can he possibly replace Grant writing Superman?
This brings me back to Brian Azzarello's run on Superman. Brian's excellent work on 100 Bullets and Hellblazer won him the job of writing Superman with Jim Lee on art. Unfortunately, it became increasingly apparent that superhero books weren't Azzarello's first love and his Superman stories suffered as a result. I would even go so far as to accuse him of trying to write Superman without paying much attention to Superman in this period. Azzarello wanted to make the story about faith, Middle Eastern politics, and the innocent bystanders more than about Superman. His stories were intelligent and definitely outside the box but they seemed to completely miss the point of Superman and that killed the fun. Could the possible selection of Andy Diggle be a repeat of this or do you think he has the chops to keep the momentum going on Action Comics?