As said, there will be *bits* of dialogue, but nothing like what they tried to do with Phantom and Rent, taking recitative and trying to make it sound like dialogue. Also, Evita's problem wasn't that it was wall to wall music. It's problem was miscasting, lack of bite, and the fact that there is no real linear story. Evita the stage show is really a vehicle for an imaginative director and ferocious singers. Evita the film had neither.
This feature looks fantastic. And I'm surprised at how well Amanda Seyfried sounds in the little we've heard of her. And of course, what they're showing us is one of many takes of these songs that might not even make it into the final film.
"Sing the words, Patti!!!!" Stephen Sondheim to Patti LuPone.