“Freaky Friday” meets “Friday the 13th” in the bloody R-rated horror comedy, “Freaky.” Vince Vaughn plays a deranged serial killer who supernaturally switches bodies with a mousey teenager. While “Freaky” doesn’t quite live up to its wacky promise, Vaughn milks his dual role for all its comic worth. Mel Gibson plays Santa Claus…you heard that right…in yet another wacky, violent R-rated comedy, “Fatman.” A spoiled, wealthy kid sends a hired killer to knock off Saint Nick when he gets a lump of coal for Christmas. Intended as a pitch-black satire, “Fatman” is bleak and annoying instead of campy and amusing. It’s a lump of coal in your cinematic stocking. Impressive, nuanced performances from Kate Winslet and Saoirse Ronan add strength to the slow-moving period romance, “Ammonite.” Winslet plays a reclusive paleontologist who begins a forbidden romance with the wife of a fellow scientist in 1840s England. “Ammonite” should have caught emotional fire, but instead merely simmers. Eighty-six-year-old screen legend Sophia Loren returns in the sentimental Netflix drama, “The Life Ahead.” Loren plays an elderly Italian Holocaust survivor who reluctantly takes in a troubled 12-year-old Sudanese refugee. Loren is getting all the attention, but young Ibrahima Gueye carries…