I'm thinking they won't have to sensationalize him at all.
He is a real life butcher.
Also, it would be hard to discredit if they play close to the chest.
I'm not talking about anything counter to the truth. Just some artistic license, and things that would enhance and emphasize the truth... like a lustful smirk as he aggressively twists the scissors; playing up rough and callous treatment of an infant born alive; a fantasy sequence, where he plays out a particularly macabre scene in his mind; enhancing the uncleanliness of the killing room, using horror-movie style lighting and music; a scene where pro-lifers are verbally and physically abused in front of the clinic; a scene where a Democrat politician thwarts inspection attempts, and cuts a deal to brush the conditions of this clinic under the rug...
There would be an endless list of ways to enhance the story as a dramatic feature film that would tell the true tale, offer some context via creative license, and portray Gosnell and the abortion industry that protected him in the worst possible light.
And you KNOW the film would be discredited by the Leftists even if it was just 100% surveillance film of Gosnell himself. Might as well give them something to bitch about.