@festal How did you find the superblocks with blocked off streets? I tried it a year ago and failed even though they have a dedicated website for it.
@mistertim Yes, there is a lot of information on the map. :)
After clicking around I found this page which mentions the places you mentioned.
https://ajuntament.barcelona.cat/superilles/en/content/the-new-green-hubs-and-squares
Large spaces for local people, with meeting areas, children's games and street furniture, where greenery takes centre stage. This is what the new green axes and squares in Eixample will be like. Consell de Cent, Rocafort, Comte Borrell and Girona streets will have a totally different look, with vehicles disappearing to make way for spaces full of life. In addition, at the points where Carrer Consell de Cent meets the streets of Rocafort, Comte Borrell, Enric Granados and Girona, four large new squares will be created (each with 2,000 square metres of space).