Whoopi Goldberg has promised ‘Sister Act 3’ is coming “soon”. The 68-year-old actress – who plays Deloris Van Cartier in the film franchise – is “excited” about the long-awaited movie and though she didn’t share any details about the plot, she has reassured fans that they won’t need to wait too much longer to see the film. She told ‘Entertainment Tonight’: “I can say it’s coming. It’s coming around the mountain when it comes. It’ll be here soon. I’m excited. It’s time for it, you know, it’s time.” After years of delays, Whoopi thinks now is the right time for the movie. She explained: “Because…