Current status: construction of the new building is (almost) complete, they are mostly dealing with the part outside.

As for the name, nothing is visible for the moment.

The following documents seem reliable sources for the name:

https://www.bruxelles.be/sites/default/files/bxl/CP_-_Terre-Neuve.pdf
name:fr = Centre sportif Terre-Neuve

https://www.brussel.be/sites/default/files/bxl/PB_-_Terre-Neuve.pdf
name:nl = Sportcentrum Nieuwland