I'd be interested in playing the monster that destroys his family. Maybe a ancient magical entity that his family had long ago bound and imprisioned that Scott accidentally released as a kid. The entity escaped and has been picking off Scott's family members for years before finding him again. They hook up and the entity gets into Scott's house to destroy the rest of the family while also releasing various other imprisioned entities. Scott could find a way to bind him again at the last minute and forces him to help him hunt down the rest of the freed creatures.