Hey everybody,
being stuck with the same problem,
I put some hours in research and it seems that for those of us stuck without a ride from Barcelona,
the best thing (economicaly) to do is:
get a bus from Estacion del Nord, leaving 16:30 arriving Zaragoza 20:15 (15€)
and get the bus to Nowhere there, leaving (same station, as Zaragoza has train&bus terminal in the same place) at 20:45 (18€)
The Estación de Nord is easy to find with public transport, also if you come from the airport.
The ONLY thing that kinda worries me is: how to recognize at Zaragoza the placement/bus to Nowhere. Will that be marked somewhere? Will we receive an email with the exact stopping point,
because for now it says:
"right in front of trainstation", googling this, it has a big, wide, very wide front!