Given that frequent flier programs are often the only profitable part of many airlines, I suspect that if BA were to become bankrupt with a view to starting a new entity, they would need to find a way to protect the frequent flier program. Otherwise they would lose their key marketing weapon for premium passengers and would ultimately struggle to re-establish themselves. I'm not saying people would not lose out in any way, but I think this would be at the forefront of management minds.
What happens in the next few months will be interesting to say the least. At the end of the day, whatever happens it will be a sad outcome. There are real people being used as pawns here (staff and passengers). As we all know, BA has some great cabin crew who deserve a competitive package, and some absolutely rubbish ones who have been there too long, have become lazy and should have been kicked out years ago. This was demonstrated perfectly in my last flight earlier this month. Flying in F there was a chap and a lady serving. The chap did a great job, worked quickly and was very friendly. The lady could not be bothered. She was slow, simply going through the motions and kept forgetting things. In the end we gave up asking her for anything!