There was a lot of interest when the Salander case broken --- so he's trying to capitalize on that, I suppose.
Or he’s promoting his father’s homosexuality - a trait his poor dad tried to hide. Doesn’t DeNiro have enough fame and fortune to leave the old man alone? In the immortal words of Dorothy Parker when talking about the furor in the wake of F. Scott Fitzgerald’s death: Not only are they digging up his bones, they’re gnawing on them.