On ITV news just now, 3 stadiums are nowhere near ready and they've had several years to prepare! They still have to install 42000 seats in one stadium, and one of the others is still a bit of a building site. One of the stadiums not ready will be for the opening Brazil match. They're saying it's a race against the clock. Since this is now becoming a hurried job, I'd be worried about something collapsing during a match.