Apparently Go Set a Watchman might give readers a different view of Atticus Finch. The story begins twenty years after To Kill a Mockingbird and was actually the first manuscript from which her literary agent suggested Harper Lee change the story which eventually developed into To Kill a Mockingbird. The Go Set a Watchman manuscript was then discarded until uncovered recently (Read the first chapter here)
You can see part of the PBS interview here (it expires 7/24)