While the information disclosed by Sndp indeed covers the initial plans for OO-SGC (the last B743 to be in operation with SN), I beg to differ on what has actually happened with it.
More specifically, it is currently parked outside one of SN's maintenance hangars in BRU. It has been ridden of all SN-titles and has been renamed N3439F. By consequence, my best guess is there are no specific plans as to what will finally happen to this fine aircraft.
I hope that's some of the information you were looking for.