I'm sorry but I think we are dreaming if we think that there will be another successful classic pax operation. I think you just have to consider it realistically:
1. Passengers hate old aircraft.
2. Even at $90 the fuel price is high and what does the classic burn, 40% more than the 777, that would nearly cover the cost of leasing a 777.
3. These aircraft are old, they require maintenance unless you're going to cut corners like some of the freight operations. What do you do with 400 pax when the aircraft goes tech., that's $100 a night per person in hotel costs.
4. Keeping these aircraft better than cat 1 will also be difficult, so even with weather issues other operators will have an advantage.
I'm sure the list goes on, but I just can't see it happening. I do hope I'm wrong though....