I'm more interested to have a continuing supply for P30 in 135 and 120 formats.
That said, I'd definitely be interested in 126. I won't buy much, though. It's just that I would be able to use my very first own camera again, which I received (in 1976?) as present for my catholic communion. The camera is an all-plastic Kodak instamatic at the lower end, so I wouldn't use it for (intended to be) "good" pictures. But one never knows what pictures will come out at the end of the day...
I think Ferrania could setup a "preorder period" for 126 over, let's say, one year. If there are enough orders to do it profitable for them, they could do a 126 run. It should be stated upfront, that if not enough orders arrive, it will not happen. Depending on how much orders are filed, the price of the film might vary. Don't know how to handle this transparently, though.
And, if this is a success, make future preorder periods in the next years...
regards,
chris