^Then definitely a facade will cover that. I'm thinking it won't be King's Cross.
As for the Leaky Cauldron, the aesthetics of the first two films were practically thrown out the window when Cuaron came on board. He and Stuart Craig really completely rebranded the films, especially in terms of production design. Sure, DA will be inspired by the first film... then again, it was really only extensively seen in the first film. I have a feeling that the Leaky Cauldron's entrance would be more similar to Cuaron's vision, since that was the film that featured LC the most.