Trius
Waiting on Maitani
I know nothing about the manufacturing of sensor and the curved plane issue, but my guess is that it is not foreseeable. My rationale is that ZI, with an eye to a possible full-frame digital RF, went ahead and designed their ZM lenses to be compatible with both film and digital cameras. Granted they could come out with a line of digital-specific lenses if they needed to, much as Olympus decided to do with their ZD lenses for 4/3s mount.
My guess is that if anyone will come up with a full frame sensor suitable for RF, it won't be Canon (why would they), but Kodak. Whether they can solve for the (perceived) need for "better" high ISO performance or not, I don't know. But since they have experience with larger sensor sizes and have access to very good engineers close to home, I'd bet on them being the manufacturer to bring it to the table.
Whether there's a business case for it is another question. Most likely it would be a spin-off benefit of a new larger sensor for a medium format back, so the R&D costs would be partially sunk.
My guess is that if anyone will come up with a full frame sensor suitable for RF, it won't be Canon (why would they), but Kodak. Whether they can solve for the (perceived) need for "better" high ISO performance or not, I don't know. But since they have experience with larger sensor sizes and have access to very good engineers close to home, I'd bet on them being the manufacturer to bring it to the table.
Whether there's a business case for it is another question. Most likely it would be a spin-off benefit of a new larger sensor for a medium format back, so the R&D costs would be partially sunk.