Flightglobal reports that Air Nostrum will launch 4 new routes out of Vigo next summer, including BRU. Flights are to be operated 2 weekly with CRJ-900 from early July to late September.
Apparently they already announced plans for these routes (the ones they launched from Vigo this summer and BRU, FCO, Alicante and Menorca in 2016) late last year, but seems it wasn't really picked up here, or otherwise I missed it.
Ho fatto una ricerca, ma non ho trovato thread recenti (ultimo su Air Nostrum nel 2010)