A cardboard Schloss or Flussbad-for-the-people?

"Belle Epoque Paris had the Eiffel Tower; Art Deco New York, the Empire State Building. Frank Gehry’s design for the Guggenheim Museum gave Bilbao, Spain, a once rusty backwater, a shiny symbol of its modern identity. What will it be here for early 21st century Berlin: a cardboard Schloss or the whimsical, environmentally friendly Flussbad-for-the-people?"
2015, Michael Kimmelman, New York Times
https://www.nytimes.com/2015/10/12/arts/design/the-flussbad-plan-in-berlin-reimagines-a-canal-for-the-people.html 

projekte des staedtebaus
senat berlin