The 77-year-old actress recently filed documents to contest an amendment to her late daughter Lisa Marie Presley's will, which removed her and the singer's former business manager Barry Siegel from being in charge of her trust and replaced them with the star's eldest kids, Riley, 33, and Benjamin - who took his own life in 2020 - and now a legal expert has predicted that the odds of victory could be in her favour, but warned that the proceedings could ""drag on for years""