Apparently back when Watchmen first came out, Terry Gilliam optioned it for a film adaptation. However, after several unsatisfactory drafts of the script, he then decided that given the scope of the material, a single film wouldn't be a feasible way to encompass the entire story. He instead offered to direct it as at least a five-part miniseries, but no one took him up on it, so the project got shelved.
That would have been way more awesome than this is looking to be.