Strange shape! Notice that the athletics (friidrott) part will be purely an indoor implementation (ie 200 meters tracks).
They say the capacity will be 50000-60000 for football (not decided yet exactly). There will be a roof, but it is planned to be possible to open it. It isn't made explicit, but since there will be a roof, they plan to use it during the winter, and then I guess they must implement AT.
The new stadium is planned to be the new home for Hammarby IF (Söderstadion will be destructed) and probably thought to be the new national arena.
If it is built one consequence is that Sweden can play home games any time of the year.
-- All that we see, or seem, is but a dream, within a dream, installed by the Machine