Though I really like Fargo and enjoyed Hawley's spec script 'Man Alive' this just feels like a massive so what? Who is this film for? While I don't blame Fox for going after the comic book dollar after Deadpool broke out I doubt the core Marvel audience are going to be falling over themselves for this.
While Doom does have an interesting back story without being placed in context of a protagonist trying to stop him why does he deserve his own film? Yet another villain deemed to be an 'anti hero' in order to justify giving him his own film?
Also, when he says he's 'developing' the film it's possible that he isn't writing it at all as, if memory serves, his deal at Fox also calls for him to develop films that he will produce but not actually write or direct.
If Fox were to make this a dark little $20/30m film it could be interesting but they won't.