Know nothing has been announced yet, but I was on a stadium tour earlier today and the tour guide said they've had planning permission to knock down and rebuild the north stand to raise the capacity to 52k. I'd imagine that the club will announce something fairly soon, especially since staff are telling people...
He also mentioned that we're going to have a bigger car park, a museum, a superstore and a hotel. I'm starting to think that my tour guide was Tony Xia in a mask. I should've asked about the theme park!