been there and although a few year ago now it still brings up hard feelings.
I don't think you have much chance and a lot depends on the number of children which live in the school's catchment area and go to the school in question, not including those children from another catchment who choose to go to the school. This does not work the other way round, if catchment pupils leave to choose another school they are counted as lost! The plan of the Scottish parliament is to close all schools under 50 pupils within the next 15 years or so but the process might be speeded up in light of recent and coming cuts.
I represented the parents going to the Council meeting when the decision was taken and it was an utter farce. There actually were Council members who had no idea where the school actually was they were supposed to decide on. The whole process was very upsetting for teachers, parents and pupils alike. The council's school mercinary actually had barged into the school and said to the head teacher "I will have you closed by Christmas" ! To counteract protests later he dangled the carrot of a new school which was supposed to be built to cover the catchment area of the 3 village schools in the area - which years on of course never materialized - surprise. One of the schools next in line merged with another under the same head teacher, only on of the 3 schools is still open and safe, as they have over 50 children in the catchment are, which now is much larger, of course. Trouble is that once the rumours are out parents will take their kids elsewhere which will make it even harder to keep a school safe...
you have all my sympathies and I wish you success in your fight!